Abrégé

A method for laser welding a stack of metal foils to a metal substrate includes securing the stack of metal foils between a surface of the metal substrate and a removable clamp such that a side of the stack, formed by edges of the foils, is located on an interior portion of the surface, and the clamp is set back from the side of the stack. A first laser welding step interconnects the foils with an initial laser-weld joint by serially tracing a plurality of lateral paths along the foil edges with a laser beam. A second laser welding step connects the stack of interconnected foils to the substrate by tracing, with a laser beam, a path along the interface between the initial laser-weld joint and the substrate surface. This two-step laser welding process circumvents the difficulties of welding together materials with highly disparate thicknesses in a single laser-welding operation.

Classes IPC  ?

• B23K 26/26 - Soudage de joints continus rectilignes
• B23K 26/073 - Détermination de la configuration du spot laser
• B23K 26/10 - Dispositifs comportant un mouvement relatif entre le faisceau laser et la pièce avec un support fixe
• B23K 37/04 - Dispositifs ou procédés auxiliaires non spécialement adaptés à un procédé couvert par un seul des autres groupes principaux de la présente sous-classe pour maintenir ou mettre en position les pièces
• B23K 101/36 - Dispositifs électriques ou électroniques
• B23K 103/10 - Aluminium ou ses alliages

Abrégé

A method for laser welding a stack of metal foils (120) to a metal substrate includes securing (210) the stack of metal foils (120) between a surface (130S) of the metal substrate and a removable clamp (140) such that a side of the stack, formed by edges of the foils (120), is located on an interior portion of the surface (130S), and the clamp (140) is set back from the side of the stack. A first laser welding step (220) interconnects the foils with an initial laser-weld joint by serially (222) tracing a plurality of lateral paths along the foil edges (120E) with a laser beam. A second laser welding step (230) connects the stack of interconnected foils (120) to the substrate by tracing, with a laser beam, a path along the interface between the initial laser-weld joint and the substrate surface. This two-step laser welding process circumvents the difficulties of welding together materials with highly disparate thicknesses in a single laser-welding operation.

Classes IPC  ?

• B23K 26/082 - Systèmes de balayage, c. à d. des dispositifs comportant un mouvement relatif entre le faisceau laser et la tête du laser
• B23K 26/10 - Dispositifs comportant un mouvement relatif entre le faisceau laser et la pièce avec un support fixe
• B23K 26/12 - Travail par rayon laser, p.ex. soudage, découpage ou perçage  sous atmosphère particulière, p.ex. dans une enceinte
• B23K 26/26 - Soudage de joints continus rectilignes
• B23K 26/323 - Assemblage tenant compte des propriétés du matériau concerné faisant intervenir des parties faites de matériaux métalliques dissemblables
• B23K 37/04 - Dispositifs ou procédés auxiliaires non spécialement adaptés à un procédé couvert par un seul des autres groupes principaux de la présente sous-classe pour maintenir ou mettre en position les pièces
• H01M 50/516 - Procédés pour interconnecter les batteries ou cellules adjacentes par soudage, brasage ou brasage tendre
• H01M 50/536 - Connexions d’électrodes dans un boîtier de batterie caractérisées par le procédé de fixation des conducteurs aux électrodes, p.ex. soudage
• B23K 101/36 - Dispositifs électriques ou électroniques
• B23K 103/10 - Aluminium ou ses alliages
• B23K 103/12 - Cuivre ou ses alliages

Abrégé

A method for laser welding a stack of metal foils (120) to a metal substrate includes securing (210) the stack of metal foils (120) between a surface (130S) of the metal substrate and a removable clamp (140) such that a side of the stack, formed by edges of the foils (120), is located on an interior portion of the surface (130S), and the clamp (140) is set back from the side of the stack. A first laser welding step (220) interconnects the foils with an initial laser-weld joint by serially (222) tracing a plurality of lateral paths along the foil edges (120E) with a laser beam. A second laser welding step (230) connects the stack of interconnected foils (120) to the substrate by tracing, with a laser beam, a path along the interface between the initial laser-weld joint and the substrate surface. This two-step laser welding process circumvents the difficulties of welding together materials with highly disparate thicknesses in a single laser-welding operation.

Classes IPC  ?

• B23K 26/082 - Systèmes de balayage, c. à d. des dispositifs comportant un mouvement relatif entre le faisceau laser et la tête du laser
• B23K 26/323 - Assemblage tenant compte des propriétés du matériau concerné faisant intervenir des parties faites de matériaux métalliques dissemblables
• H01M 50/516 - Procédés pour interconnecter les batteries ou cellules adjacentes par soudage, brasage ou brasage tendre
• H01M 50/536 - Connexions d’électrodes dans un boîtier de batterie caractérisées par le procédé de fixation des conducteurs aux électrodes, p.ex. soudage
• B23K 26/12 - Travail par rayon laser, p.ex. soudage, découpage ou perçage  sous atmosphère particulière, p.ex. dans une enceinte
• B23K 26/26 - Soudage de joints continus rectilignes

Abrégé

The invention relates to a method for laser welding workpieces (W), a laser beam (L) directed onto a workpiece surface having such a radiation intensity that the workpiece material of the at least one workpiece (W) to be welded is melted in the region of the laser focus (F), a vapor capillary (D) which is at least partly surrounded by a molten bath (S) forming in the region of the laser focus (F). The laser beam (L) is moved relative to the workpiece surface in a direction of advance (V) in order to produce a weld seam. According to the invention, the molten bath (S) is subjected to mechanical stress by directing a gas stream (G) onto the workpiece surface for the purpose of stabilization during welding. The invention further relates to a device (1) designed for carrying out said method.

Classes IPC  ?

• B23K 26/24 - Soudage de joints continus
• B23K 26/14 - Travail par rayon laser, p.ex. soudage, découpage ou perçage  en utilisant un écoulement de fluide, p.ex. un jet de gaz, associé au faisceau laser; Buses à cet effet

Abrégé

2 laser is tunable between emission bands by translating the spectrally-selective element along the optical axis.

Classes IPC  ?

• H01S 3/03 - Lasers, c. à d. dispositifs utilisant l'émission stimulée de rayonnement électromagnétique dans la gamme de l’infrarouge, du visible ou de l’ultraviolet - Détails de structure des tubes laser à décharge dans le gaz
• H01S 3/08 - Structure ou forme des résonateurs optiques ou de leurs composants
• H01S 3/082 - Structure ou forme des résonateurs optiques ou de leurs composants comprenant trois réflecteurs ou plus définissant une pluralité de résonateurs, p.ex. pour la sélection ou la suppression de modes
• H01S 3/223 - Lasers, c. à d. dispositifs utilisant l'émission stimulée de rayonnement électromagnétique dans la gamme de l’infrarouge, du visible ou de l’ultraviolet caractérisés par le matériau utilisé comme milieu actif à gaz le gaz actif étant polyatomique, c. à d. contenant plusieurs atomes
• H01S 3/06 - Structure ou forme du milieu actif
• H01S 3/063 - Lasers à guide d'ondes, p.ex. amplificateurs laser
• H01S 3/081 - Structure ou forme des résonateurs optiques ou de leurs composants comprenant trois réflecteurs ou plus
• H01S 3/105 - Commande de l'intensité, de la fréquence, de la phase, de la polarisation ou de la direction du rayonnement, p.ex. commutation, ouverture de porte, modulation ou démodulation par commande de la position relative ou des propriétés réfléchissantes des réflecteurs de la cavité

Abrégé

The invention relates to a method for laser welding workpieces (W), a laser beam (L) directed onto a workpiece surface having such a radiation intensity that the workpiece material of the at least one workpiece (W) to be welded is melted in the region of the laser focus (F), a vapor capillary (D) which is at least partly surrounded by a molten bath (S) forming in the region of the laser focus (F). The laser beam (L) is moved relative to the workpiece surface in a direction of advance (V) in order to produce a weld seam. According to the invention, the molten bath (S) is subjected to mechanical stress by directing a gas stream (G) onto the workpiece surface for the purpose of stabilization during welding. The invention further relates to a device (1) designed for carrying out said method.

Classes IPC  ?

• B23K 26/14 - Travail par rayon laser, p.ex. soudage, découpage ou perçage  en utilisant un écoulement de fluide, p.ex. un jet de gaz, associé au faisceau laser; Buses à cet effet
• B23K 26/24 - Soudage de joints continus

Produits et services

Laser apparatus, machines and systems for marking, writing, printing, cutting, curing, drilling, machining, engraving, perforating and welding; laser apparatus, machines and systems for surface and materials treatment; parts and fittings for all the aforesaid goods. Lasers for industrial use; lasers for marking, writing, printing, cutting, curing, drilling, machining, engraving, perforating and welding; lasers for surface and materials treatment; lasers for scientific and measuring use; laser beam sources and laser systems; CO2 gas lasers; solid state lasers; diode lasers; picosecond lasers; laser beam sources for apparatus, machines and systems for marking, writing, printing, cutting, curing, drilling, machining, engraving, perforating and welding; laser beam sources for apparatus, machines and systems for surface and materials treatment; power supplies for lasers; components and parts for lasers and laser beam sources; computer software and hardware relating to lasers, laser systems and laser apparatus; parts and fittings for all the aforesaid goods. Lasers for medical, surgical, dental and cosmetic use; apparatus and systems for applying laser radiation and light for medical, surgical, dental or cosmetic use; parts and fittings for all the aforesaid. Installation, maintenance and repair of lasers; installation, maintenance and repair of laser apparatus, machines and systems for marking, writing, printing, cutting, curing, drilling, machining, engraving, perforating and welding; installation, maintenance and repair of laser apparatus, machines and systems for surface and materials treatment; installation, maintenance and repair of lasers for industrial use, lasers for marking, writing, printing, cutting, curing, drilling, machining, engraving; installation, maintenance and repair of perforating and welding lasers for surface and materials treatment, lasers for scientific and measuring use, laser beam sources and laser systems, CO2 gas lasers, solid state lasers, diode lasers, picosecond lasers, laser beam sources for apparatus, machines and systems for marking, writing, printing, cutting, curing, drilling, machining, engraving, perforating and welding, laser beam sources for apparatus, machines and systems for surface and materials treatment; installation, maintenance and repair of power supplies for lasers, components and parts for lasers and laser beam sources; installation, maintenance and repair of lasers for medical, surgical, dental and cosmetic use, apparatus and systems for applying laser radiation and light for medical, surgical, dental or cosmetic use; information, advisory and consultancy services relating to the aforesaid. Treatment of materials by laser; treatment of materials (marking, writing, printing, cutting, curing, drilling, machining, engraving, perforating and welding) by laser; rental of lasers, laser machines, systems and apparatus; heat treatment services; printing and marking by laser; manufacture of lasers, laser systems and laser apparatus; information, advisory and consultancy services relating to the aforesaid. Education and training services in the field of lasers; education and training services in the fields of laser apparatus, machines and systems for marking, writing, printing, cutting, curing, drilling, machining, engraving, perforating and welding; education and training services in the fields of laser apparatus, machines and systems for surface and materials treatment; education and training services in the fields of lasers for medical, surgical, dental and cosmetic use, apparatus and systems for applying laser radiation and light for medical, surgical, dental or cosmetic use; information, advisory and consultancy services relating to the aforesaid. Research and development services relating to lasers, laser systems and laser apparatus; design of lasers, laser systems and laser apparatus; technical consultancy relating to lasers, laser systems and laser apparatus; computer software and hardware development relating to lasers, laser systems and laser apparatus; information, advisory and consultancy services relating to the aforesaid.

Produits et services

Laser apparatus, machines and systems for marking, writing, printing, cutting, curing, drilling, machining, engraving, perforating and welding; laser apparatus, machines and systems for surface and materials treatment; parts and fittings for all the aforesaid goods. Lasers for industrial use; lasers for marking, writing, printing, cutting, curing, drilling, machining, engraving, perforating and welding; lasers for surface and materials treatment; lasers for scientific and measuring use; laser beam sources and laser systems; CO2 gas lasers; solid state lasers; diode lasers; picosecond lasers; laser beam sources for apparatus, machines and systems for marking, writing, printing, cutting, curing, drilling, machining, engraving, perforating and welding; laser beam sources for apparatus, machines and systems for surface and materials treatment; power supplies for lasers; components and parts for lasers and laser beam sources; computer software and hardware relating to lasers, laser systems and laser apparatus; parts and fittings for all the aforesaid goods. Lasers for medical, surgical, dental and cosmetic use; apparatus and systems for applying laser radiation and light for medical, surgical, dental or cosmetic use; parts and fittings for all the aforesaid. Installation, maintenance and repair of lasers; installation, maintenance and repair of laser apparatus, machines and systems for marking, writing, printing, cutting, curing, drilling, machining, engraving, perforating and welding; installation, maintenance and repair of laser apparatus, machines and systems for surface and materials treatment; installation, maintenance and repair of lasers for industrial use, lasers for marking, writing, printing, cutting, curing, drilling, machining, engraving; installation, maintenance and repair of perforating and welding lasers for surface and materials treatment, lasers for scientific and measuring use, laser beam sources and laser systems, CO2 gas lasers, solid state lasers, diode lasers, picosecond lasers, laser beam sources for apparatus, machines and systems for marking, writing, printing, cutting, curing, drilling, machining, engraving, perforating and welding, laser beam sources for apparatus, machines and systems for surface and materials treatment; installation, maintenance and repair of power supplies for lasers, components and parts for lasers and laser beam sources; installation, maintenance and repair of lasers for medical, surgical, dental and cosmetic use, apparatus and systems for applying laser radiation and light for medical, surgical, dental or cosmetic use; information, advisory and consultancy services relating to the aforesaid. Treatment of materials by laser; treatment of materials (marking, writing, printing, cutting, curing, drilling, machining, engraving, perforating and welding) by laser; rental of lasers, laser machines, systems and apparatus; heat treatment services; printing and marking by laser; manufacture of lasers, laser systems and laser apparatus; information, advisory and consultancy services relating to the aforesaid. Education and training services in the field of lasers; education and training services in the fields of laser apparatus, machines and systems for marking, writing, printing, cutting, curing, drilling, machining, engraving, perforating and welding; education and training services in the fields of laser apparatus, machines and systems for surface and materials treatment; education and training services in the fields of lasers for medical, surgical, dental and cosmetic use, apparatus and systems for applying laser radiation and light for medical, surgical, dental or cosmetic use; information, advisory and consultancy services relating to the aforesaid. Research and development services relating to lasers, laser systems and laser apparatus; design of lasers, laser systems and laser apparatus; technical consultancy relating to lasers, laser systems and laser apparatus; computer software and hardware development relating to lasers, laser systems and laser apparatus; information, advisory and consultancy services relating to the aforesaid.

Abrégé

A CO2 laser (10) that generates laser-radiation in just one emission band of a CO2 gas-mixture has resonator mirrors (12,14) that form an unstable resonator and at least one spectrally-selective element (24,26) located on the optical axis (18) of the resonator. The at least one spectrally-selective element (24,26) may be in the form of one or more protruding or recessed surfaces. Spectral-selectivity is enhanced by forming a stable resonator along the optical axis (18) that includes the at least one spectrally-selective element (24,26). The CO2 laser (10) is tunable between emission bands by translating the at least one spectrally-selective element (24,26) along the optical axis(18).

Classes IPC  ?

• H01S 3/08 - Structure ou forme des résonateurs optiques ou de leurs composants
• H01S 3/223 - Lasers, c. à d. dispositifs utilisant l'émission stimulée de rayonnement électromagnétique dans la gamme de l’infrarouge, du visible ou de l’ultraviolet caractérisés par le matériau utilisé comme milieu actif à gaz le gaz actif étant polyatomique, c. à d. contenant plusieurs atomes
• H01S 3/082 - Structure ou forme des résonateurs optiques ou de leurs composants comprenant trois réflecteurs ou plus définissant une pluralité de résonateurs, p.ex. pour la sélection ou la suppression de modes
• H01S 3/081 - Structure ou forme des résonateurs optiques ou de leurs composants comprenant trois réflecteurs ou plus
• H01S 3/03 - Lasers, c. à d. dispositifs utilisant l'émission stimulée de rayonnement électromagnétique dans la gamme de l’infrarouge, du visible ou de l’ultraviolet - Détails de structure des tubes laser à décharge dans le gaz
• H01S 3/105 - Commande de l'intensité, de la fréquence, de la phase, de la polarisation ou de la direction du rayonnement, p.ex. commutation, ouverture de porte, modulation ou démodulation par commande de la position relative ou des propriétés réfléchissantes des réflecteurs de la cavité

Abrégé

The invention relates to a resonator mirror (4) for an optical resonator (1) of a laser apparatus (2), in particular a gas or band conduction laser, comprising a reflecting surface (6) having a structured region (5) which extends over a region of the reflecting surface (6) that is centred about the optical axis (5). According to one variant of the concept underlying the invention, the structured region (5) has at least one reflecting surface portion (8, 18, 28, 38, 48, 58, 68) which, in relation to the reflecting surface (6) extending outside of the structured region (5), is arranged offset parallel to the optical axis (A) by half a predetermined wavelength or by an integer multiple of half the predetermined wavelength. According to another variant, the structured region (5) has at least two surface portions (8, 18, 28, 38, 48, 58, 68) which are arranged offset to one another parallel to the optical axis (A) by half a predetermined wavelength or by an integer multiple of half the predetermined wavelength. Further, the invention relates to a laser apparatus (2), the optical resonator (1) of which comprises a resonator mirror (4) embodied thus.

Classes IPC  ?

• H01S 3/08 - Structure ou forme des résonateurs optiques ou de leurs composants
• H01S 3/223 - Lasers, c. à d. dispositifs utilisant l'émission stimulée de rayonnement électromagnétique dans la gamme de l’infrarouge, du visible ou de l’ultraviolet caractérisés par le matériau utilisé comme milieu actif à gaz le gaz actif étant polyatomique, c. à d. contenant plusieurs atomes
• H01S 3/081 - Structure ou forme des résonateurs optiques ou de leurs composants comprenant trois réflecteurs ou plus
• H01S 3/03 - Lasers, c. à d. dispositifs utilisant l'émission stimulée de rayonnement électromagnétique dans la gamme de l’infrarouge, du visible ou de l’ultraviolet - Détails de structure des tubes laser à décharge dans le gaz

Abrégé

2 laser is tunable between emission bands by translating the spectrally-selective element along the optical axis.

Classes IPC  ?

• H01S 3/03 - Lasers, c. à d. dispositifs utilisant l'émission stimulée de rayonnement électromagnétique dans la gamme de l’infrarouge, du visible ou de l’ultraviolet - Détails de structure des tubes laser à décharge dans le gaz
• H01S 3/06 - Structure ou forme du milieu actif
• H01S 3/08 - Structure ou forme des résonateurs optiques ou de leurs composants
• H01S 3/082 - Structure ou forme des résonateurs optiques ou de leurs composants comprenant trois réflecteurs ou plus définissant une pluralité de résonateurs, p.ex. pour la sélection ou la suppression de modes
• H01S 3/223 - Lasers, c. à d. dispositifs utilisant l'émission stimulée de rayonnement électromagnétique dans la gamme de l’infrarouge, du visible ou de l’ultraviolet caractérisés par le matériau utilisé comme milieu actif à gaz le gaz actif étant polyatomique, c. à d. contenant plusieurs atomes
• H01S 3/081 - Structure ou forme des résonateurs optiques ou de leurs composants comprenant trois réflecteurs ou plus
• H01S 3/105 - Commande de l'intensité, de la fréquence, de la phase, de la polarisation ou de la direction du rayonnement, p.ex. commutation, ouverture de porte, modulation ou démodulation par commande de la position relative ou des propriétés réfléchissantes des réflecteurs de la cavité
• H01S 3/063 - Lasers à guide d'ondes, p.ex. amplificateurs laser

Abrégé

The invention relates to an optical resonator (1) for a laser device (20), in particular for a microchip solid-state laser, comprising an optical medium (4) which is arranged between a first and a second reflective element (2, 3) that are arranged at a distance from one another in a longitudinal direction (P). The optical resonator length is specified by the distance from the first reflective element (2) to the second reflective element (3) in the longitudinal direction (P), the longitudinal extent of the medium (4) arranged between the reflective elements, and the refractive index thereof. According to the invention, the optical resonator length varies in at least one lateral direction (L) running perpendicularly to the longitudinal direction (P). The invention further relates to a laser device (20) comprising such a resonator (1) and to a method for adjusting the laser device (20).

Classes IPC  ?

• H01S 3/08 - Structure ou forme des résonateurs optiques ou de leurs composants
• H01S 3/081 - Structure ou forme des résonateurs optiques ou de leurs composants comprenant trois réflecteurs ou plus
• H01S 3/06 - Structure ou forme du milieu actif

Abrégé

The invention relates to an optical resonator (1) for a high-power fibre laser having an optically active medium which, according to the invention, comprises a multimode fibre (2) having a fibre core (10) doped at least in sections, wherein the multimode fibre (2) is arranged between a highly reflective first reflection element (3) and an at least partly transmissive second reflection element (4). The first reflection element (3) comprises a dielectric mirror (5). The invention furthermore relates to a fibre laser (100) comprising an optical resonator (1) embodied in this way. The first reflection element (3) can be embodied as a curved dichroic mirror, which firstly simplifies the coupling-in of the pump radiation from a pump module (7) and also reduces the resonator losses. The second reflection element (4) can be embodied as a partly reflective fibre Bragg grating.

Classes IPC  ?

• H01S 3/067 - Lasers à fibre optique
• G02B 6/42 - Couplage de guides de lumière avec des éléments opto-électroniques
• H01S 3/094 - Procédés ou appareils pour l'excitation, p.ex. pompage utilisant le pompage optique par de la lumière cohérente
• H01S 3/0941 - Procédés ou appareils pour l'excitation, p.ex. pompage utilisant le pompage optique par de la lumière cohérente produite par un laser à semi-conducteur, p.ex. par une diode laser
• H01S 3/16 - Matériaux solides
• H01S 3/08 - Structure ou forme des résonateurs optiques ou de leurs composants

Abrégé

Very fine closed form structures can be scribed via filamentation in the transparent substrate very quickly, the modified zone can be etched via dry or wet chemical etching to release the closed form. A metal layer engages the transparent substrate and is covered with photoresist. A portion of the photoresist and a portion of the metal are removed simultaneously with the creation of a filament through the transparent substrate. The photoresist protects the portion of the metal layer that is not removed. The desired closed form can be released by weakening the cut region using dry or wet chemical etching to remove the desired part.

Classes IPC  ?

• B23K 26/00 - Travail par rayon laser, p.ex. soudage, découpage ou perçage 

Abrégé

A device for frequency conversion of a first laser beam generated with a first frequency. The device has a first crystal for generating a second laser beam having a second frequency, which differs from the first frequency. The second laser beam propagates parallel to the first laser beam after leaving the first crystal. A second crystal, which generates from the first and second laser beams a third laser beam having a different third frequency. An optical deflection device influences the relative beam position between first and second laser beams such that the first and second laser beams, before entering into the second crystal, propagate at an angle with respect to one another, which angle differs from zero, and enter in a manner spaced apart from one another at an entrance surface of the second crystal and intersect within the second crystal with at the same time collinear phase matching.

Classes IPC  ?

• G02F 1/35 - Optique non linéaire
• H01S 3/00 - Lasers, c. à d. dispositifs utilisant l'émission stimulée de rayonnement électromagnétique dans la gamme de l’infrarouge, du visible ou de l’ultraviolet

Abrégé

Disclosed are folding optics (1) for a laser pulse compressor, said folding optics comprising at least two reflecting elements (6), each having a flat reflecting surface (7), which reflecting elements are spatially fixed by a retaining device (2) by means of a frictional connection in such a way that the two reflecting surfaces (7) are arranged at a definable angle with respect to each other. According to the invention, each of the two reflecting elements (6) is oriented along a respective side surface of an angle block (8), wherein the two side surfaces are arranged at a definable angle with respect to each other and the angle block (8) serves as an abutment in order to achieve the frictional connection to the retaining device (2).

Classes IPC  ?

• G02B 7/182 - Montures, moyens de réglage ou raccords étanches à la lumière pour éléments optiques pour miroirs pour miroirs
• G02B 5/122 - Réflecteurs reflex du type en sommet de cube, en trièdre ou en réflecteur triple
• G02B 5/12 - Réflecteurs reflex

Abrégé

In a device for separating a longitudinally-extended cylindrical workpiece, which has a diameter in the sub-millimeter range, into individual segments, the workpiece is guided in a clamping device. The clamping device includes a first and a second clamping jaw and a feed opening for the workpiece. The feed opening is fitted between the clamping jaws on the side facing the other clamping jaw and a longitudinal groove which defines a direction of advancement of the workpiece for receiving and guiding the workpiece between the clamping jaws. The clamping device has a passage for a laser beam and a cutting gas, which passage defines a working zone, disrupts the longitudinal groove and runs parallel thereto. A cutter head is arranged in the working zone and has an outlet opening for the laser beam and the cutting gas, which outlet opening is aligned with the passage.

Classes IPC  ?

• B23K 26/142 - Travail par rayon laser, p.ex. soudage, découpage ou perçage  en utilisant un écoulement de fluide, p.ex. un jet de gaz, associé au faisceau laser; Buses à cet effet pour l'enlèvement de résidus
• B23K 26/38 - Enlèvement de matière par perçage ou découpage
• B23K 37/04 - Dispositifs ou procédés auxiliaires non spécialement adaptés à un procédé couvert par un seul des autres groupes principaux de la présente sous-classe pour maintenir ou mettre en position les pièces
• B23K 26/16 - Enlèvement de résidus, p.ex. des particules ou des vapeurs produites pendant le traitement de la pièce à travailler
• B23K 37/053 - Alignement des pièces cylindriques; Dispositifs de serrage à cet effet
• B23K 26/08 - Dispositifs comportant un mouvement relatif entre le faisceau laser et la pièce
• B23K 26/70 - Opérations ou équipement auxiliaires
• B23K 26/146 - Travail par rayon laser, p.ex. soudage, découpage ou perçage  en utilisant un écoulement de fluide, p.ex. un jet de gaz, associé au faisceau laser; Buses à cet effet l'écoulement de fluide contenant un liquide
• B23K 26/40 - Enlèvement de matière en tenant compte des propriétés du matériau à enlever
• B23K 26/402 - Enlèvement de matière en tenant compte des propriétés du matériau à enlever en faisant intervenir des matériaux non métalliques, p.ex. des isolants
• A61F 2/86 - Stents ayant une forme caractérisée par des éléments filiformes; Stents ayant une forme caractérisée par une structure de type filet ou de type à mailles
• B23K 101/06 - Tubes
• B23K 103/08 - Métaux ou alliages non ferreux
• B23K 103/00 - Matières à braser, souder ou découper

Abrégé

The invention relates to a method for removing dielectric layers from semiconductor components by means of a laser beam. According to said method, the dielectric layer is irradiated with a laser beam which has, upon incidence on the dielectric layer, a substantially homogeneous power density over the laser beam cross-section.

Classes IPC  ?

• B23K 26/40 - Enlèvement de matière en tenant compte des propriétés du matériau à enlever
• B23K 26/06 - Mise en forme du faisceau laser, p.ex. à l’aide de masques ou de foyers multiples

Abrégé

The invention relates to a method for activating foreign atoms in a workpiece (18) by means of a pulsed first laser beam (4) having a first wavelength and by means of a pulsed second laser beam (8) having a second wavelength superposed on the first laser beam, wherein the pulse length (t1) of the first laser beam (4) is longer than the pulse length (t2) of the second laser beam (8) and the pulse (P) of the second laser beam (8) hits the workpiece (18) temporally within the pulse (P) of the first laser beam (4). The invention further relates to a device for carrying out the method.

Classes IPC  ?

• H01L 21/268 - Bombardement par des radiations ondulatoires ou corpusculaires par des radiations d'énergie élevée les radiations étant électromagnétiques, p.ex. des rayons laser

Abrégé

A fiber optic mode scrambler includes a multi-mode optical fiber formed with a core and a cladding around the core and a non-adiabatic cross-sectional shape change zone in the optical fiber. The fiber further has a bending region extending over a length of the optical fiber. The optical fiber has a non-zero curvature at the bending region and a device for maintaining the curvature of the optical fiber at the bending region. Mode scramblers can be provided that are accurately adjusted to match with different desired optical characteristics. A well-controlled manufacturing method for the mode scrambler is also described.

Classes IPC  ?

• G02B 6/26 - Moyens de couplage optique
• G02B 6/14 - Convertisseurs de mode
• G02B 6/10 - OPTIQUE ÉLÉMENTS, SYSTÈMES OU APPAREILS OPTIQUES - Détails de structure de dispositions comprenant des guides de lumière et d'autres éléments optiques, p.ex. des moyens de couplage du type guide d'ondes optiques
• G02B 6/125 - Courbures, branchements ou intersections
• G02B 6/02 - Fibres optiques avec revêtement

Abrégé

The invention relates to a method and a laser assembly for processing a workpiece (12) using a pulsed laser beam (L). In said method, during processing the lateral distribution of the spectral phase is varied non-linearly over the duration of a laser pulse and/or at least between two laser pulses that at least partially overlap on the workpiece (12).

Classes IPC  ?

• B23K 26/08 - Dispositifs comportant un mouvement relatif entre le faisceau laser et la pièce
• B23K 26/06 - Mise en forme du faisceau laser, p.ex. à l’aide de masques ou de foyers multiples
• G02F 1/35 - Optique non linéaire
• G02F 1/01 - Dispositifs ou dispositions pour la commande de l'intensité, de la couleur, de la phase, de la polarisation ou de la direction de la lumière arrivant d'une source lumineuse indépendante, p.ex. commutation, ouverture de porte ou modulation; Optique non linéaire pour la commande de l'intensité, de la phase, de la polarisation ou de la couleur

Abrégé

Systems and methods are described for forming continuous laser filaments in transparent materials. A burst of ultrafast laser pulses is focused such that a beam waist is formed external to the material being processed without forming an external plasma channel, while a sufficient energy density is formed within an extended region within the material to support the formation of a continuous filament, without causing optical breakdown within the material. Filaments formed according to this method may exhibit lengths exceeding 10 mm. In some embodiments, an aberrated optical focusing element is employed to produce an external beam waist while producing distributed focusing of the incident beam within the material. Various systems are described that facilitate the formation of filament arrays within transparent substrates for cleaving/singulation and/or marking. Optical monitoring of the filaments may be employed to provide feedback to facilitate active control of the process.

Classes IPC  ?

• B23K 26/00 - Travail par rayon laser, p.ex. soudage, découpage ou perçage 
• B23K 26/50 - Travail par transmission du faisceau laser à travers ou dans la pièce à travailler
• H01L 21/02 - Fabrication ou traitement des dispositifs à semi-conducteurs ou de leurs parties constitutives
• H01L 21/78 - Fabrication ou traitement de dispositifs consistant en une pluralité de composants à l'état solide ou de circuits intégrés formés dans ou sur un substrat commun avec une division ultérieure du substrat en plusieurs dispositifs individuels

Abrégé

Systems and methods are described for forming continuous laser filaments in transparent materials. A burst of ultrafast laser pulses is focused such that a beam waist is formed external to the material being processed without forming an external plasma channel, while a sufficient energy density is formed within an extended region within the material to support the formation of a continuous filament, without causing optical breakdown within the material. Filaments formed according to this method may exhibit lengths exceeding up to 10 mm. In some embodiments, an aberrated optical focusing element is employed to produce an external beam waist while producing distributed focusing of the incident beam within the material. Various systems are described that facilitate the formation of filament arrays within transparent substrates for cleaving/singulation and/or marking. Optical monitoring of the filaments may be employed to provide feedback to facilitate active control of the process.

Classes IPC  ?

• B23K 26/00 - Travail par rayon laser, p.ex. soudage, découpage ou perçage 
• B23K 26/50 - Travail par transmission du faisceau laser à travers ou dans la pièce à travailler
• H01L 21/02 - Fabrication ou traitement des dispositifs à semi-conducteurs ou de leurs parties constitutives
• H01L 21/78 - Fabrication ou traitement de dispositifs consistant en une pluralité de composants à l'état solide ou de circuits intégrés formés dans ou sur un substrat commun avec une division ultérieure du substrat en plusieurs dispositifs individuels

Abrégé

An apparatus, system and method for the processing of orifices in materials by laser filamentation that utilizes an optical configuration that focuses the incident laser light beam in a distributed manner along the longitudinal beam axis. This distributed focusing method enables the formation of filaments over distances, and the laser and focusing parameters are adjusted to determine the filament propagation and termination points so as to develop a single/double end stopped orifice, or a through orifice. Selected transparent substrates from a stacked or nested configuration may have orifices formed therein/therethrough without affecting the adjacent substrate. These distributed focusing methods support the formation filaments with lengths well beyond ten millimeters in borosilicate glass and similar brittle materials and semiconductors.

Classes IPC  ?

• B23K 26/38 - Enlèvement de matière par perçage ou découpage

Produits et services

Lasers, not for medical purposes.

Produits et services

Lasers, not for medical purposes.

Abrégé

A device for frequency conversion of a first laser beam (6) generated with a first frequency (ω1) by a laser beam source (4) comprises: a) an optically non-linear first crystal (2) for generating a second laser beam (8) having a second frequency (ω2), which differs from the first frequency (ω1), said second laser beam propagating parallel to the first laser beam (6) after leaving the first optically non-linear crystal (2), b) an optically non-linear second crystal (10), which generates from the first and second laser beams (6, 8) at least one third laser beam (18) having a third frequency (ω3), which differs from the first frequency (ω1) and the second frequency (ω2), c) an optical deflection device (12) for influencing the relative beam position between first and second laser beams (6, 8) in such a way that d) first and second laser beams (6, 8), before entering into the second crystal (10), propagate at an angle (a) with respect to one another, which angle differs from zero, and e) enter in a manner spaced apart from one another at an entrance surface (16) of the second crystal (10) and intersect within the second crystal (10) with at the same time collinear phase matching, wherein f) the entrance surface (16) of the second crystal (10) is inclined at a wedge angle (γ) which differs from 0° with respect to two mutually parallel, mutually opposite side surfaces (17) of the second crystal (10).

Classes IPC  ?

• G02F 1/35 - Optique non linéaire

Abrégé

The invention relates to a fiber optic mode scrambler component and method of making the same. The mode scrambler comprises a multi-mode optical fiber (10, 30, 40, 50) comprising a core (12) and a cladding (14) around the core (12) and a non-adiabatic cross-sectional shape change zone (16) in the optical fiber (10, 30, 40, 50). According to the invention, the fiber (10, 30, 40, 50) further comprises a bending region (20) extending over a length of the optical fiber (10, 30, 40, 50), the optical fiber (10, 30, 40, 50) having a non-zero curvature at the bending region (20), and means for maintaining said curvature of the optical fiber (10, 30, 40, 50) at the bending region (20). The invention allows for providing mode scramblers which are accurately adjusted to match with different desired optical characteristics, and a well-controllable manufacturing method for the mode scrambler.

Classes IPC  ?

• G02B 6/14 - Convertisseurs de mode
• G02B 6/02 - Fibres optiques avec revêtement
• G02B 27/09 - Mise en forme du faisceau, p.ex. changement de la section transversale, non prévue ailleurs
• G02B 6/125 - Courbures, branchements ou intersections

Abrégé

The invention relates to an assembly for processing a workpiece (22) by means of a laser beam (L), in particular for processing a highly reflective workpiece, comprising a fiber laser (1) as a laser beam source for producing a pulsed primary laser beam (L1) having a bandwidth that is less than 1 nm.

Classes IPC  ?

• B23K 26/06 - Mise en forme du faisceau laser, p.ex. à l’aide de masques ou de foyers multiples
• B23K 26/00 - Travail par rayon laser, p.ex. soudage, découpage ou perçage 
• B23K 26/08 - Dispositifs comportant un mouvement relatif entre le faisceau laser et la pièce
• B23K 26/03 - Observation, p.ex. surveillance de la pièce à travailler
• H01S 3/067 - Lasers à fibre optique

Abrégé

The invention relates to a method for marking components (2) of an aircraft engine, especially turbine blades that consist of a titanium aluminide intermetallic compound. According to said method, a pulsed laser beam which has a pulse width of less than 10ps and which is generated by a solid state laser is used.

Classes IPC  ?

• B23K 26/00 - Travail par rayon laser, p.ex. soudage, découpage ou perçage 
• B23K 26/36 - Enlèvement de matière
• B23K 26/40 - Enlèvement de matière en tenant compte des propriétés du matériau à enlever
• B23K 26/06 - Mise en forme du faisceau laser, p.ex. à l’aide de masques ou de foyers multiples

Abrégé

In a device for separating a longitudinally-extended cylindrical workpiece (36), which has a diameter in the sub-millimetre range, into individual segments (74), the workpiece is guided in a clamping device (4) which comprises at least one first and one second clamping jaw (6, 7) and a feed opening (10) for the workpiece (36), the feed opening being fitted between the clamping jaws (7) on the side facing the other clamping jaw (6), and a longitudinal groove (32) which defines a direction of advancement of the workpiece (36) in order to receive and guide the workpiece (36) between the clamping jaws (6, 7). The clamping device (4) has a passage (68) for a laser beam (L) and a cutting gas (SG), which passage defines a working zone (46), disrupts the longitudinal groove (32) and runs parallel thereto, a cutter head (2) being arranged in the working zone (46) and having an outlet opening (48) for the laser beam (L) and the cutting gas (SG), which outlet opening is aligned with the passage (68). This measure allows the workpiece (36) to be separated into individual segments (74) with precision.

Classes IPC  ?

• B23K 26/38 - Enlèvement de matière par perçage ou découpage
• B23K 26/08 - Dispositifs comportant un mouvement relatif entre le faisceau laser et la pièce
• B23K 37/053 - Alignement des pièces cylindriques; Dispositifs de serrage à cet effet
• B23K 26/40 - Enlèvement de matière en tenant compte des propriétés du matériau à enlever
• B23K 26/14 - Travail par rayon laser, p.ex. soudage, découpage ou perçage  en utilisant un écoulement de fluide, p.ex. un jet de gaz, associé au faisceau laser; Buses à cet effet
• A61F 2/86 - Stents ayant une forme caractérisée par des éléments filiformes; Stents ayant une forme caractérisée par une structure de type filet ou de type à mailles

Abrégé

1), wherein the first support member is adapted to exchange heat induced by free-space radiation. The second support member is made of material, such as quartz, which is transparent to the wavelengths used in the component.

Classes IPC  ?

• G02B 6/44 - Structures mécaniques pour assurer la résistance à la traction et la protection externe des fibres, p.ex. câbles de transmission optique
• G02B 6/46 - Procédés ou appareils adaptés à l'installation de fibres optiques ou de câbles optiques
• G02B 6/02 - Fibres optiques avec revêtement
• H01S 3/067 - Lasers à fibre optique

Abrégé

2 is formed as a laser-active medium in a discharge space which is formed between two plate-shaped metal electrodes, the flat faces of which are located opposite one another. A resonator mirror is arranged on each of the mutually opposite end faces of the discharge space, the mirrors forming an unstable resonator parallel to the flat faces. At least one of the mutually facing flat faces is provided either on the entire flat face with a dielectric layer the thickness of which is greater on at least one sub-surface than in the remaining area of the flat face, or the at least one flat face is provided with a dielectric layer exclusively on at least one sub-surface.

Classes IPC  ?

• H01S 3/22 - Lasers, c. à d. dispositifs utilisant l'émission stimulée de rayonnement électromagnétique dans la gamme de l’infrarouge, du visible ou de l’ultraviolet caractérisés par le matériau utilisé comme milieu actif à gaz
• H01S 3/223 - Lasers, c. à d. dispositifs utilisant l'émission stimulée de rayonnement électromagnétique dans la gamme de l’infrarouge, du visible ou de l’ultraviolet caractérisés par le matériau utilisé comme milieu actif à gaz le gaz actif étant polyatomique, c. à d. contenant plusieurs atomes
• H01S 3/03 - Lasers, c. à d. dispositifs utilisant l'émission stimulée de rayonnement électromagnétique dans la gamme de l’infrarouge, du visible ou de l’ultraviolet - Détails de structure des tubes laser à décharge dans le gaz
• H01S 3/038 - Electrodes, p.ex. forme, configuration ou composition particulières
• H01S 3/08 - Structure ou forme des résonateurs optiques ou de leurs composants

Abrégé

The invention concerns a fiber-optic component, in particular a fiber coupler, and method for manufacturing thereof. The component comprises a housing (25), at least one first optical element (21) capable of guiding light and having an output end, the first optical element (21) being affixed to said housing (25) at a mounting zone (26A), and at least one second optical element (22, 23) optically coupled to the first optical element (21) at a coupling zone (27) for receiving light from the output end of the first optical element (21). According to the invention, the component comprises at least one zone (29) of light-scattering material arranged in the vicinity of the first optical element (21) at a region between the coupling zone (27) and the mounting zone (26A). By means of the invention, the effect potentially harmful reverse radiation in fiber-optic components can be mitigated.

Classes IPC  ?

• G02B 6/26 - Moyens de couplage optique
• G02B 6/34 - Moyens de couplage optique utilisant des prismes ou des réseaux
• G02B 6/42 - Couplage de guides de lumière avec des éléments opto-électroniques
• C03B 19/00 - Autres méthodes de façonnage du verre
• G02B 6/24 - Couplage de guides de lumière
• G02B 6/30 - Moyens de couplage optique pour usage entre fibre et dispositif à couche mince
• G02B 6/36 - Moyens de couplage mécaniques
• G02B 6/28 - Moyens de couplage optique ayant des bus de données, c. à d. plusieurs guides d'ondes interconnectés et assurant un système bidirectionnel par nature en mélangeant et divisant les signaux

Abrégé

The invention relates to a device for the laser processing of a workpiece (14), containing an apparatus (6) for producing a first and a second laser beam (L1, L2), which propagate obliquely to each other at an angle (a), and a refracting and focusing unit (10) for guiding and focusing the laser beams (L1, L2) over or onto the workpiece (14), wherein the laser beams (L1, L2) are linearly polarized in directions that are perpendicular to each other.

Classes IPC  ?

• B23K 26/06 - Mise en forme du faisceau laser, p.ex. à l’aide de masques ou de foyers multiples
• B23K 26/03 - Observation, p.ex. surveillance de la pièce à travailler

Abrégé

A laser pulse generated by a fiber laser is used in a method and a device for processing materials. An optical switching element (16) arranged in the beam path of the laser beam (L) is closed at the earliest when the output power (P) of the laser beam (L) falls below a specified value.

Classes IPC  ?

• B23K 26/42 - Traitement préliminaire; Opérations ou appareillage auxiliaires (B23K 26/16 a priorité);;
• B23K 26/06 - Mise en forme du faisceau laser, p.ex. à l’aide de masques ou de foyers multiples
• H01S 3/067 - Lasers à fibre optique
• H01S 3/13 - Stabilisation de paramètres de sortie de laser, p.ex. fréquence ou amplitude

Abrégé

The invention relates to a method for producing a rupture disc (4). In said method, an engraving (6) is introduced into said rupture disc (4) as an intended break structure, using a pulsed laser beam (L) that has a pulse duration of less than 10ps. The laser beam (L) for introducing said engraving (6) is guided across the surface of the rupture disc (4) in a plurality of tracks which lie side by side.

Classes IPC  ?

• B23K 26/00 - Travail par rayon laser, p.ex. soudage, découpage ou perçage 
• B23K 26/36 - Enlèvement de matière
• B23K 26/08 - Dispositifs comportant un mouvement relatif entre le faisceau laser et la pièce
• B23K 26/06 - Mise en forme du faisceau laser, p.ex. à l’aide de masques ou de foyers multiples
• F16K 17/16 - Soupapes ou clapets de sûreté; Soupapes ou clapets d'équilibrage fermant sur insuffisance de pression d'un côté avec élément de rupture l'élément étant un diaphragme de rupture

Abrégé

A device forms grooves or slits in a material web as it moves in a longitudinal direction. The grooves or slits, which are spaced apart from one another in the longitudinal direction, are formed by a laser beam. A laser beam source generates a continuous laser beam and a deflection mirror directs the laser beam onto the material web. The mirror rotates about an axis of rotation and it is displaceable along the axis. The mirror has a first mirror face, the line of intersection of which with a sectional plane perpendicular with respect to the axis of rotation forms a circular arc which varies depending on the axial position of the sectional plane. A second mirror face deflects the laser beam towards an absorber. Focusing optics focus the laser beam, after reflection from the first mirror face, onto the moving material web.

Classes IPC  ?

• B23K 26/16 - Enlèvement de résidus, p.ex. des particules ou des vapeurs produites pendant le traitement de la pièce à travailler

Abrégé

In a stripline laser, a gas mixture containing carbon dioxide is situated as a laser-active medium between two plate-type electrodes lying with their flat sides opposite one another. The electrodes define a discharge space, at whose end sides lying opposite one another a resonator mirror is respectively arranged. The resonator mirrors form an unstable resonator. To operate the stripline laser in the 9.3 μm band and/or in the 9.6 μm band, the electrodes are provided with a passivation layer on their flat sides. The passivation layer, of at least one electrode, contains silicon dioxide in a region covering a partial area of a flat side. A distance between the electrodes is set such that the attenuation of laser beams in the 10.3 μm band and in the 10.6 μm band is greater than the attenuation of laser beams in the 9.3 μm band and/or in the 9.6 μm band.

Classes IPC  ?

• H01S 3/097 - Procédés ou appareils pour l'excitation, p.ex. pompage par décharge dans le gaz d'un laser à gaz

Abrégé

In a slab laser, a gas mixture containing carbon dioxide CO2 is formed as a laser-active medium in a discharge space (10) which is formed between two plate-shaped metal electrodes (6, 8), the flat faces of which are located opposite one another. A resonator mirror (16, 18) is arranged on each of the mutually opposite end faces (12, 14) of the discharge space, said mirrors forming an unstable resonator parallel to the flat faces. At least one of the mutually facing flat faces is provided either on the entire flat face (2, 4) with a dielectric layer (20) the thickness of which is greater on at least one sub-surface (21) than in the remaining area (22) of the flat face (2, 4), or the at least one flat face (2, 4) is provided with a dielectric layer (20) exclusively on at least one sub-surface (21).

Classes IPC  ?

• H01S 3/03 - Lasers, c. à d. dispositifs utilisant l'émission stimulée de rayonnement électromagnétique dans la gamme de l’infrarouge, du visible ou de l’ultraviolet - Détails de structure des tubes laser à décharge dans le gaz
• H01S 3/08 - Structure ou forme des résonateurs optiques ou de leurs composants
• H01S 3/223 - Lasers, c. à d. dispositifs utilisant l'émission stimulée de rayonnement électromagnétique dans la gamme de l’infrarouge, du visible ou de l’ultraviolet caractérisés par le matériau utilisé comme milieu actif à gaz le gaz actif étant polyatomique, c. à d. contenant plusieurs atomes

Abrégé

A stripline laser amplifier contains a plurality of electrodes (4a-c), which are arranged stacked one above the other and extended areally, the flat sides of said electrodes lying opposite one another, and in each case one narrow discharge space (6a, b) being formed between said electrodes, in which a carbon dioxide (CO2)-containing laser gas is located, wherein in each case one folding mirror (10a, b) is arranged at the end sides (8a, b) of each discharge space (6a, b) and the discharge spaces (6a, b) are connected optically one behind the other with a coupling mirror arrangement (12).

Classes IPC  ?

• H01S 3/07 - Structure ou forme du milieu actif consistant en une pluralité de parties, p.ex. segments
• H01S 3/03 - Lasers, c. à d. dispositifs utilisant l'émission stimulée de rayonnement électromagnétique dans la gamme de l’infrarouge, du visible ou de l’ultraviolet - Détails de structure des tubes laser à décharge dans le gaz
• H01S 3/23 - Agencement de plusieurs lasers non prévu dans les groupes , p.ex. agencement en série de deux milieux actifs séparés
• H01S 3/223 - Lasers, c. à d. dispositifs utilisant l'émission stimulée de rayonnement électromagnétique dans la gamme de l’infrarouge, du visible ou de l’ultraviolet caractérisés par le matériau utilisé comme milieu actif à gaz le gaz actif étant polyatomique, c. à d. contenant plusieurs atomes
• H01S 3/08 - Structure ou forme des résonateurs optiques ou de leurs composants

Abrégé

A method is provided for the internal processing of a transparent substrate in preparation for a cleaving step. The substrate is irradiated with a focused laser beam that is comprised of pulses having an energy and pulse duration selected to produce a filament within the substrate. The substrate is translated relative to the laser beam to irradiate the substrate and produce an additional filament at one or more additional locations. The resulting filaments form an array defining an internally scribed path for cleaving said substrate. Laser beam parameters may be varied to adjust the filament length and position, and to optionally introduce V-channels or grooves, rendering bevels to the laser-cleaved edges. Preferably, the laser pulses are delivered in a burst train for lowering the energy threshold for filament formation, increasing the filament length, thermally annealing of the filament modification zone to minimize collateral damage, improving process reproducibility, and increasing the processing speed compared with the use of low repetition rate lasers.

Classes IPC  ?

• B23K 26/08 - Dispositifs comportant un mouvement relatif entre le faisceau laser et la pièce
• B23K 26/402 - Enlèvement de matière en tenant compte des propriétés du matériau à enlever en faisant intervenir des matériaux non métalliques, p.ex. des isolants
• B23K 26/38 - Enlèvement de matière par perçage ou découpage

Abrégé

In a stripline laser, a gas mixture containing carbon dioxide CO2 is situated as laser-active medium between two plate-type electrodes (2, 4) lying with their flat sides (20, 40) opposite one another. The electrodes (2, 4) define a discharge space (5), at whose end sides lying opposite one another a resonator mirror (6, 8) is respectively arranged. The resonator mirrors (6, 8) form an unstable resonator parallel to the flat sides (20,40). In order to be able to operate the stripline laser in the 9.3 μm band and/or in the 9.6 µm band, the electrodes (2, 4) are provided with a passivation layer (10, 12) on their flat sides (20, 40) lying opposite one another, said passivation layer, in the case of at least one electrode (2), containing silicon dioxide SiO2 in a region (14) covering at least a partial area (22) of the flat side (20), wherein the distance (a) between the electrodes (2, 4) is set in such a way that the attenuation of laser beams in the 10.3 µm band and in the 10.6 µm band is greater than the attenuation of laser beams in the 9.3 µm band and/or in the 9.6 µm band.

Classes IPC  ?

• H01S 3/03 - Lasers, c. à d. dispositifs utilisant l'émission stimulée de rayonnement électromagnétique dans la gamme de l’infrarouge, du visible ou de l’ultraviolet - Détails de structure des tubes laser à décharge dans le gaz
• H01S 3/038 - Electrodes, p.ex. forme, configuration ou composition particulières
• H01S 3/223 - Lasers, c. à d. dispositifs utilisant l'émission stimulée de rayonnement électromagnétique dans la gamme de l’infrarouge, du visible ou de l’ultraviolet caractérisés par le matériau utilisé comme milieu actif à gaz le gaz actif étant polyatomique, c. à d. contenant plusieurs atomes

Abrégé

A laser cutting system (10) includes a laser device providing a collimated laser beam,a multiple-axis laser scanner (16) causing the laser beam (L) to move along a path(P)within a working area and a gas-assisted nozzle (18) having a lens (39) and a nozzle orifice (42) wherein said nozzle orifice size is greater than said working area.

Classes IPC  ?

• B23K 26/38 - Enlèvement de matière par perçage ou découpage
• B23K 26/08 - Dispositifs comportant un mouvement relatif entre le faisceau laser et la pièce
• B23K 26/14 - Travail par rayon laser, p.ex. soudage, découpage ou perçage  en utilisant un écoulement de fluide, p.ex. un jet de gaz, associé au faisceau laser; Buses à cet effet

Abrégé

The laser machining method involves the following steps: A) using a laser source to generate a laser beam at an initial wavelength of between 700 and 1200 nanometers and formed of a succession of laser pulses (10); B) doubling the frequency of part (12) of the laser beam using a non-linear crystal; C) varying the power during each emitted laser pulse (10) so that the power profile over the period of this laser pulse has, in an initial sub-period (T1), a maximum power peak or a pulse part with a maximum power and, in an intermediate sub-period (T2), of duration longer than the initial sub-period, a power lower than said maximum power over all of this intermediate sub-period. The power of the laser is varied in such a way that the maximum power has a value at least twice as high as the mean power over the period of the laser pulse and that the rise time taken to increase to a maximum power from the start of each laser pulse is shorter than 0.3 milliseconds. The machining method relates in particular to the welding of highly reflective metals such as copper, gold, silver or an alloy containing one of these metals. The intention also relates to a laser machining installation for implementing the method described hereinabove.

Classes IPC  ?

• B23K 26/20 - Assemblage
• B23K 26/06 - Mise en forme du faisceau laser, p.ex. à l’aide de masques ou de foyers multiples
• H01S 3/109 - Multiplication de la fréquence, p.ex. génération d'harmoniques

Abrégé

The present invention relates to laser-machining equipment (2) for etching grooves (8, 9) in a wall of a mechanical part (4), in particular of a crankshaft for an internal combustion engine, said equipment being provided with a fiber-optic laser device (12) and arranged to supply laser pulses. The fiber-optic laser device is controlled so that the laser pulses have a peak power that is greater than 400W and at least twice as great as the maximum average power of the laser device and so that the period of the laser pulses is in the nanosecond range (1 ns to 1000 ns) or lower. According to a first embodiment, the fiber-optic laser device is controlled in a QCW (quasi continuous wave) mode. According to a second, preferred, embodiment, the fiber-optic laser device is controlled in a triggered or Q-switched mode. The operating modes selected enable an increase in the effectiveness of the machining and to obtain a groove having an optimum cross-section, in particular a small mean radius of curvature at the bottom of the groove enabling accurate subsequent fracturing of the mechanical part using the least force.

Classes IPC  ?

• B23K 26/36 - Enlèvement de matière
• B23K 26/08 - Dispositifs comportant un mouvement relatif entre le faisceau laser et la pièce
• B23K 26/06 - Mise en forme du faisceau laser, p.ex. à l’aide de masques ou de foyers multiples
• B23K 26/10 - Dispositifs comportant un mouvement relatif entre le faisceau laser et la pièce avec un support fixe
• B23K 26/067 - Division du faisceau en faisceaux multiples, p.ex. foyers multiples
• B23D 31/00 - Machines à cisailler ou dispositifs de cisaillage couverts par aucun ou par plusieurs des groupes ; Combinaisons de machines à cisailler
• F16C 9/04 - Paliers pour bielles; Leurs fixations
• H01S 3/067 - Lasers à fibre optique

Abrégé

The invention relates to a method for separating silicon solar cells (4), wherein in a first work step, a groove (22) is introduced into a silicon wafer (2) containing the silicon solar cells (4) along a separating line (5) in a front side (14) of the silicon wafer (2) adjacent to a p-n junction (16) in the silicon wafer (2) using a first laser beam (L1), which groove has a depth (t) reaching at least to the p-n junction (16) and extends to a lateral edge (24) of the silicon wafer (2). In a second work step, the silicon wafer (2) is cut along the separating line (5) starting at the lateral edge (24) using a second laser beam directed into the groove (22), wherein the melt (M) arising during the cutting is driven out of the cutting kerf (28) arising during the cutting using a cutting gas (G) flowing at least approximately in the direction of the second laser beam (L2).

Classes IPC  ?

• H01L 31/18 - Procédés ou appareils spécialement adaptés à la fabrication ou au traitement de ces dispositifs ou de leurs parties constitutives

Abrégé

The invention relates to a microstrip laser having an unstable resonator (2), wherein a laser gas (LG) is located between two-dimensionally extended electrodes (6) that are arranged in pairs with the flat sides thereof facing each other and that define a narrow discharge space (7) having a longitudinal extension (8) and a transverse extension (10) and that are connected to a high-frequency generator (HF) that is operated in a clocked manner, wherein at least one of the electrodes (6) is provided with a plurality of openings (16) that extend from the flat side thereof facing away from the discharge space (7) towards the discharge space (7). In this way, the microstrip laser can be operated stably over a large clock frequency range.

Classes IPC  ?

• H01S 3/03 - Lasers, c. à d. dispositifs utilisant l'émission stimulée de rayonnement électromagnétique dans la gamme de l’infrarouge, du visible ou de l’ultraviolet - Détails de structure des tubes laser à décharge dans le gaz
• H01S 3/038 - Electrodes, p.ex. forme, configuration ou composition particulières
• H01S 3/0971 - Procédés ou appareils pour l'excitation, p.ex. pompage par décharge dans le gaz d'un laser à gaz excité transversalement
• H01S 3/041 - Dispositions pour la gestion thermique pour des lasers à gaz
• H01S 3/08 - Structure ou forme des résonateurs optiques ou de leurs composants
• H01S 3/223 - Lasers, c. à d. dispositifs utilisant l'émission stimulée de rayonnement électromagnétique dans la gamme de l’infrarouge, du visible ou de l’ultraviolet caractérisés par le matériau utilisé comme milieu actif à gaz le gaz actif étant polyatomique, c. à d. contenant plusieurs atomes

Abrégé

The invention relates to a pump coupler (2) and a manufacturing method. The pump coupler (2) comprises a least one signal fiber (50) for outputting optical energy, multiple pump fibers (31) for inputting optical energy into the signal fiber (50), and a coupling structure (40) for coupling the optical energy of the pump fibers (31) into the signal fiber (50). A signal feed-through fiber (32) goes through the coupling structure (40). In accordance with the invention the coupling structure (40) is a tapering capillary tube (40) having a first wide end (65) and a second narrow end (70), the pump fibers (31) are connected to the wide end of the capillary tube (40), and at least the narrow end (70) of the capillary tube (70) is collapsed around the signal fiber (32).

Classes IPC  ?

• G02B 6/26 - Moyens de couplage optique
• C03B 37/15 - Finition des fibres ou filaments avec application de chaleur, p.ex. pour fabriquer des fibres optiques