Abrégé

Method for processing of material by use of a pulsed laser Each laser pulse is shaped regarding its beam profile so that a cross sectional area, which is defined by a cross section of the laser pulse in its focal point orthogonal to its propagation direction, is of particular shape and has a main extension axis of greater extent than its minor extension axis. One major crack is effected by each laser pulse, the major crack having a lateral extension basically oriented according to the main extension axis of the respective pulse in the focal point. Furthermore, each laser pulse is emitted so that the orientation of its main extension axis in the focal point corresponds to a pre-defined orientation relative to an orientation of a respective tangent to the processing path at the assigned processing point.

Classes IPC  ?

• B23K 26/02 - Mise en place ou surveillance de la pièce à travailler, p.ex. par rapport au point d'impact; Alignement, pointage ou focalisation du faisceau laser
• B23K 26/40 - Enlèvement de matière en tenant compte des propriétés du matériau à enlever
• B23K 26/53 - Travail par transmission du faisceau laser à travers ou dans la pièce à travailler pour modifier ou reformer le matériau dans la pièce à travailler, p.ex. pour faire des fissures d'amorce de rupture
• B23K 26/00 - Travail par rayon laser, p.ex. soudage, découpage ou perçage 
• B23K 26/073 - Détermination de la configuration du spot laser
• C03B 33/02 - Découpe ou fendage des feuilles de verre; Dispositifs ou machines à cet effet
• B23K 26/0622 - Mise en forme du faisceau laser, p.ex. à l’aide de masques ou de foyers multiples par commande directe du faisceau laser par impulsions de mise en forme
• C03B 33/04 - Découpe ou fendage courbe, spécialement pour la fabrication des verres de lunettes
• B23K 26/06 - Mise en forme du faisceau laser, p.ex. à l’aide de masques ou de foyers multiples
• B23K 26/38 - Enlèvement de matière par perçage ou découpage
• B23K 103/00 - Matières à braser, souder ou découper

Abrégé

Method for generating a series of laser pulses with a laser assembly, the laser assembly at least having two reflecting members, a laser medium and an electro-optical modulator are disclosed. The laser assembly operates in a light amplifying mode and runs a pulse extraction sequence. The pulse extraction sequence is run by applying a defined voltage change with reference to the amplification voltage, wherein changing of the voltage is adjusted such that at least one intermediate switching state is generated on side of the electro-optical modulator, the intermediate switching state providing a particular change of polarization of the amplified laser radiation by the electro-optical modulator, such that a final switching state is generated on side of the electro-optical modulator by applying a final extraction voltage at the end of the time period.

Classes IPC  ?

• H01S 3/107 - 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 dispositifs placés dans la cavité utilisant des dispositifs électro-optiques, p.ex. produisant un effet Pockels ou Kerr
• H01S 3/10 - 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
• H01S 3/23 - Agencement de plusieurs lasers non prévu dans les groupes , p.ex. agencement en série de deux milieux actifs séparés
• H01S 3/08 - Structure ou forme des résonateurs optiques ou de leurs composants

Abrégé

Method for processing of material by use of a pulsed laser, comprising generating a series of ultra-short laser pulses (22 ), directing each laser pulse (22) to the material with defined reference to a respectively assigned processing point (26) of a processing path (25), and focussing each laser pulse (22) so that respective focal points of the focussed laser pulses (22) comprise pre-defined spatial relations to a first surface (2) of the material, wherein each emitted laser pulse (22) effects a respective crack (24) within the material. According to the invention, each laser pulse is shaped regarding its beam profile so that a cross sectional area, which is defined by a cross section of the laser pulse in its focal point orthogonal to its propagation direction, is of particular shape and has a main extension axis (A) of greater extend than its minor extension axis. One major crack (24) is effected by each laser pulse (22), the major crack (12, 24) having a lateral extension basically oriented according to the main extension axis (A) of the respective pulse in the focal point. Furthermore, each laser pulse (22) is emitted so that the orientation of its main extension axis (A) in the focal point corresponds to a pre-defined orientation relative to an orientation of a respective tangent to the processing path (25) at the assigned processing point (26).

Classes IPC  ?

• B23K 26/073 - Détermination de la configuration du spot laser
• B23K 26/00 - Travail par rayon laser, p.ex. soudage, découpage ou perçage 
• B23K 26/06 - Mise en forme du faisceau laser, p.ex. à l’aide de masques ou de foyers multiples
• B23K 26/40 - Enlèvement de matière en tenant compte des propriétés du matériau à enlever
• C03B 33/02 - Découpe ou fendage des feuilles de verre; Dispositifs ou machines à cet effet
• C03B 33/09 - Sectionnement du verre refroidi par chocs thermiques
• C03B 33/08 - Sectionnement du verre refroidi par fusion

Abrégé

The invention pertains to a support mechanism for holding and adjusting an optical element (2), the support mechanism comprising a mounting frame (1) having a hollow-cylindrical opening (10) with a first end and a second end for accommodating the optical element (2), characterized by a thread screw (14) at the first end of the opening (10), a circular clamping nut (4) having an external thread, designed for being threaded onto the thread screw (14), and a circular collet (3) having a first part (31) for holding the optical element (2) and a second part (32) with a multitude of collet jaws (33), wherein the clamping nut (4) and the collet (3) are designed for being positioned in the opening (10) in such a way that the optical element (2) is held fixedly in the collet (3), and a tilt orientation of the optical element (2) is adjustable by rotating the collet (3) and fixable. The invention also pertains to a method for positioning and orienting an optical element (2) in a mounting frame (1).

Classes IPC  ?

• G02B 7/00 - Montures, moyens de réglage ou raccords étanches à la lumière pour éléments optiques
• G02B 7/02 - Montures, moyens de réglage ou raccords étanches à la lumière pour éléments optiques pour lentilles

Abrégé

The invention relates to a mirror arrangement for guiding a laser beam in a laser system having at least one first end mirror and one second end mirror, wherein said end mirrors define a resonator having an optical resonator axis, wherein the laser beam is guided into the resonator as an input laser beam and is guided out of the resonator again after multiple reflection at the first and second end mirrors as an output laser beam. The sequence of reflections at the first and second end mirror thereby determines a direction of rotation between the first and second end mirror, defined as an axis of rotation relative to the resonator axis, whereby a first beam path is defined and the laser beam circulates in a direction of rotation between the first and second end mirrors in the resonator defined as an axis of rotation relative to the resonator axis. The resonator is designed such that the direction of rotation is reversed at a reversing point and the laser beam in the resonator passes through at least partially in a direction of rotation opposite to the first beam path, whereby a second beam path is defined.

Classes IPC  ?

• H01S 3/10 - 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

Abrégé

The invention relates to a laser amplification system for generating retrievable laser pulses having at least one laser source, in particular with a pulse selector arranged downstream thereof for the targeted selection of amplifiable laser pulses, a laser medium for amplifying laser pulses generated by the laser source and a loss modulator, wherein the loss modulator is arranged and connected such that said modulator modulates the amplification of the laser pulses by the laser medium by loss generation so that the retrievable laser pulses are provided with a predefined pulse time and/or pulse energy. Before an amplification process for one of the laser pulses, the current amplification of the laser medium is determined and the loss generation is controlled by the loss modulator depending on the current amplification of the laser medium.

Classes IPC  ?

• H01S 3/10 - 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

Abrégé

A device for increasing the spectral bandwidth of optical pulses, comprises a hollow fiber waveguide (3A), optical components (5; 6) for focusing the beam (1) into the hollow fiber waveguide (3A) and for recollimating the beam at the exit of the hollow fiber waveguide, the hollow fiber waveguide (3A) being contained in an air-tight chamber (3B) filled with a gas at a given pressure; the length of the hollow fiber (3A) is such that, for a given input pulse energy and gas pressure, the energy contained in a fundamental propagation mode of the optical pulses that has minimum propagation losses exhibits substantially periodic oscillations over the full length (Lf) of the hollow fiber waveguide (3A) and reaches a local maximum at the output end (13) of the said hollow fiber waveguide.

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

A device for increasing the spectral bandwidth of optical pulses, comprises a hollow fiber waveguide, optical components for focusing the beam into the hollow fiber waveguide and for re-collimating the beam at the exit of the hollow fiber waveguide, the hollow fiber waveguide being contained in an air-tight chamber filled with a gas at a given pressure; the length of the hollow fiber is such that, for a given input pulse energy and gas pressure, the energy contained in a fundamental propagation mode of the optical pulses that has minimum propagation losses exhibits substantially periodic oscillations over the full length of the hollow fiber waveguide and reaches a local maximum at the output end of the said hollow fiber waveguide.

Classes IPC  ?

• G02F 1/35 - Optique non linéaire
• H01S 3/20 - Liquides

Abrégé

A laser comprising a standing wave resonator comprises a first resonator section (26), which has the first end mirror (24, 24') and, if appropriate, others of the optical elements (32, 40), which interact with the laser beam between the first end mirror (24, 24') and the laser medium (23) and a second resonator section (27), which has the second end mirror (25) and others of the optical elements (36 - 39), which interact with the laser beam between the laser medium (23) and the second end mirror (25). At least one of the optical elements (24, 40) of the first resonator section (26) is embodied in focusing fashion. As a result, the beam axes (30, 30') of the laser beam which arrives upon respective tiltings of at least one of the optical elements (25, 36-39) arranged in the second resonator section (27) have at least one crossing point (31). Said crossing point (31) or one of said crossing points (31) of the beam axes (30, 30') of the laser beam lies in the pump region of the laser medium (23) or is at a distance from the pump region which amounts to less than the Rayleigh length. The radius (w) of the laser beam, at least over the section of the laser beam which lies between the laser medium (23) and the closest focusing element (24, 40) of the first resonator section (26), is less than five times, preferably less than three times, the radius (w) of the laser beam in the pump region of the laser medium (23).

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 3/0941 - 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 3/11 - Blocage de modes; Commutation-Q; Autres techniques d'impulsions géantes, p.ex. vidange de cavité
• 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 present disclosure relates to a method and to a device (1) by which a train (2, 2) of short laser pulses of a mode-coupled laser (3) is compensated with respect to the carrier envelope offset frequency of the individual lines contained in the associated frequency comb. The aim of the disclosure is to determine the carrier envelope offset frequency and to utilize said frequency to operate an acousto-optical frequency shifter (13). In said shifter, the uncompensated train of temporally equidistantly short laser pulses is diffracted in a first order such that the individual lines of the frequency comb are shifted by the carrier envelope offset frequency. The resulting compensated train of short laser pulses has a frequency comb, the individual lines of which are integral multiples of the repetition frequency of the individual light pulses in the train of short laser pulses.

Classes IPC  ?

• H01S 3/10 - 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

Abrégé

The invention relates to a laser amplification system for generating retrievable laser pulses (S) having at least one laser source (1), in particular with a pulse selector (2) arranged downstream thereof for the targeted selection of amplifiable laser pulses, a laser medium (4'') for amplifying laser pulses generated by the laser source and a loss modulator (13), wherein the loss modulator (13) is arranged and connected such that said modulator modulates the amplification of the laser pulses by the laser medium (4'') by loss generation so that the retrievable laser pulses (S) are provided with a predefined pulse time and/or pulse energy. Before an amplification process for one of the laser pulses, the current amplification of the laser medium (4'') is determined and the loss generation is controlled by the loss modulator (13) depending on the current amplification of the laser medium (4'').

Classes IPC  ?

• H01S 3/106 - 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 dispositifs placés dans la cavité
• H01S 3/107 - 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 dispositifs placés dans la cavité utilisant des dispositifs électro-optiques, p.ex. produisant un effet Pockels ou Kerr

Abrégé

The invention relates to a mirror arrangement for guiding a laser beam in a laser system having at least one first end mirror (1) and one second end mirror (2), wherein said end mirrors (1, 2) define a resonator having an optical resonator axis (OA), wherein the laser beam is guided into the resonator as an input laser beam (ES) and is guided out of the resonator again after multiple reflection at the first and second end mirrors (1, 2) as an output laser beam (AS). The sequence of reflections at the first and the second end mirror (1, 2) thereby determines a direction of rotation between the first and second end mirror, defined as an axis of rotation relative to the resonator axis, whereby a first beam path is defined and the laser beam circulates in a direction of rotation between the first and second end mirrors in the resonator defined as an axis of rotation relative to the resonator axis (OA). The resonator is designed such that the direction of rotation is reversed at a reversing point and the laser beam in the resonator passes through at least partially in a direction of rotation opposite to the first beam path, whereby a second beam path is defined.

Classes IPC  ?

• H01S 3/11 - Blocage de modes; Commutation-Q; Autres techniques d'impulsions géantes, p.ex. vidange de cavité
• G02B 17/00 - Systèmes avec surfaces réfléchissantes, avec ou sans éléments de réfraction
• H01S 3/07 - Structure ou forme du milieu actif consistant en une pluralité de parties, p.ex. segments
• H01S 3/081 - Structure ou forme des résonateurs optiques ou de leurs composants comprenant trois réflecteurs ou plus
• 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

Abrégé

In a laser arrangement comprising at least one laser medium for producing a laser emission, a laser resonator having a beam path with a length of at least 20 cm and with at least one end mirror, the beam path within the laser resonator is formed at least partly by free-beam optics. A resonator element arranged in the beam path has at least two optical surfaces as surfaces interacting with the radiation led via the beam path, these optical surfaces being rigidly connected to one another and being adjustable together in the beam path in such a way that, on tilting by an angle error, they achieve substantially the same effect on the guidance of the beam path but with opposite sign, so that mutual compensation of tilt errors takes place.

Classes IPC  ?

• H01S 3/08 - Structure ou forme des résonateurs optiques ou de leurs composants

Abrégé

A laser amplification arrangement comprising a laser medium for producing an amplified laser emission as output signal from a useful signal to be amplified and a pump source has a switching component for coupling the useful signal into the laser medium. Laser medium and switching component are formed and arranged so that a division of an input signal (ES) into the useful signal and a background signal is effected, the background signal being passed through the laser medium at a time immediately before and/or after the coupling-in of the useful signal to be amplified.

Classes IPC  ?

• H01S 3/13 - Stabilisation de paramètres de sortie de laser, p.ex. fréquence ou amplitude
• H01S 3/091 - Procédés ou appareils pour l'excitation, p.ex. pompage utilisant le pompage optique
• H01S 3/092 - Procédés ou appareils pour l'excitation, p.ex. pompage utilisant le pompage optique par de la lumière incohérente produite par une lampe-éclair

Produits et services

Laser welding machines, laser cutting machines, laser drilling machines. Lasers, not for medical purposes; Lasers for measuring purposes, not for medical purposes; laser beam sources and laser systems, not for medical purposes; CO2 gas lasers, solid state lasers and diode lasers, not for medical purposes; laser beam sources and laser systems for the treatment of materials using laser beams; laser beam sources and laser systems for surface treatment using laser beams; laser beam sources and laser systems for hardening surfaces; laser beam perforation installations; laser inscribing and marking systems; laser beam welding, cutting and drilling equipment; components and accessories for laser beam sources and laser systems, included in class 9. Lasers for medical purposes. Services and research in the field of laser technology; technical consultancy with regard to devising and planning laser-based system solutions.

Abrégé

In a detection method for undesired double- or multiple-pulse states in an ultra-short-pulse laser system operated in the soliton regime and intended for generating femtosecond or picosecond pulses, comprising an amplifying laser medium for producing a laser emission, a laser resonator having at least one resonator mirror and a pump source, a first signal μ proportional to the pulse power P(t) or pulse energy averaged over the resonator cycle is measured for the laser emission. A second signal ν proportional to the square of the pulse power P(t), averaged over the resonator cycle, is measured for the laser emission, and the occurrence of a double- or multiple-pulse state is detected on the basis of a comparison of the measured signals μ and ν.

Classes IPC  ?

• H01S 3/10 - 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
• H01S 3/13 - Stabilisation de paramètres de sortie de laser, p.ex. fréquence ou amplitude
• 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

The invention relates to a highly repetitive laser system operating according to the reproducible amplifier principle. Said system comprises at least one amplified laser medium, a laser resonator provided with at least one resonator mirror and at least one modulator and a pump source, in particular, a laser diode source, which is used to pump the laser medium. The highly repetitive laser system is compact by virtue of the fact that a pulse extensor, having a highly dispersive effect as a result of the structure or material thereof, is integrated into the laser resonator.

Classes IPC  ?

• H01S 3/081 - Structure ou forme des résonateurs optiques ou de leurs composants comprenant trois réflecteurs ou plus

Abrégé

The use of reflecting surfaces that are inclined towards one another enables the multiple reflection of a beam path to be achieved in a laser structure. This permits the realization of compact laser assemblies. The introduction of beam-influencing media between the reflective surfaces or the configuration of said reflective surfaces from or using media of this type allows the use of the multiple reflection for influencing parameters of the radiation or radiation field.

Classes IPC  ?

• H01S 3/08 - Structure ou forme des résonateurs optiques ou de leurs composants
• H01S 3/063 - Lasers à guide d'ondes, p.ex. amplificateurs laser
• G02B 17/00 - Systèmes avec surfaces réfléchissantes, avec ou sans éléments de réfraction
• H01S 3/094 - Procédés ou appareils pour l'excitation, p.ex. pompage utilisant le pompage optique par de la lumière cohérente
• H01S 3/081 - Structure ou forme des résonateurs optiques ou de leurs composants comprenant trois réflecteurs ou plus
• 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 3/06 - Structure ou forme du milieu actif
• H01S 3/113 - Commutation-Q utilisant des absorbeurs saturables dans la cavité
• G02B 3/04 - Lentilles simples ou composées à surfaces non sphériques à surfaces continues engendrées par une rotation autour d'un axe, mais s'écartant d'une véritable sphère
• 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