An embodiment of a method of performing thermoreflectance measurements with an imaging system comprises: reflecting radiation from a number of points in a sample in response to an illuminating radiation while a temperature modulation is applied to the sample; acquiring digital images of the reflected radiation after the reflected radiation passes through an aperture; and deriving a map of relative reflectivity of the sample based on the digital images. At least a portion of the illuminating radiation can pass through at least a portion of the sample and is reflected at a change refractive index interface.
G01N 23/04 - Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups , or by transmitting the radiation through the material and forming images of the material
2.
Optical characterization of photonic integrated circuits
In one aspect, the present invention provides techniques and apparatus for optical characterization of photonic devices and/or circuits. By way of example, the techniques can be used to identify damaged devices in photonic integrated circuits. In some embodiments, thermal imaging is employed as a diagnostic tool for characterizing the devices/circuits under investigation. For example, in one embodiment, integrated cascaded semiconductor amplifiers can be characterized using amplified spontaneous emission from one amplifier as a thermal modulation input to another amplifier. A thermoreflectance image of the second amplifier can reveal flaws, if present. Further, in some embodiments, thermal imaging in conjunction with a total energy model can be employed to characterize the elements of photonic circuits optically and/or to map the optical power distribution throughout the circuits.
16 - Paper, cardboard and goods made from these materials
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41 - Education, entertainment, sporting and cultural services
Goods & Services
Paper goods, namely, non-advertising brochures, magazines and booklets, all dealing with education, and postcards, wall, [ desk and pocket ] calendars, [ bumper stickers, ] notebooks, writing paper and envelopes Clothing, namely, hats, sweatshirts, T-shirts, tank tops, shorts and sweatpants Educational services, namely, providing courses of instruction at the undergraduate, graduate, and continuing educational levels; educational library services; production of television and radio entertainment programs in the nature of lectures, musical concerts, theatrical performances, variety and talk shows, intramural sports and intercollegiate sports; entertainment in the nature of a wide variety of intramural and intercollegiate sports games; physical education services, namely, sports training programs
16 - Paper, cardboard and goods made from these materials
25 - Clothing; footwear; headgear
41 - Education, entertainment, sporting and cultural services
Goods & Services
Paper goods, namely, non-advertising brochures, magazines and booklets, all dealing with education; and [ postcards, ] [ wall, desk and pocket calendars, bumper stickers, notebooks, ] writing paper and envelopes Clothing, namely, hats, sweatshirts, T-shirts, tank tops, shorts and sweatpants Educational services, namely, providing courses of instruction at the undergraduate, graduate, and continuing educational levels; educational library services; [production of television and radio entertainment programs in the nature of lectures, musical concerts, theatrical performances, variety and talk shows, intramural sports and intercollegiate sports;] entertainment in the nature of a wide variety of intramural and intercollegiate sports games; physical education services, namely, sports training programs
16 - Paper, cardboard and goods made from these materials
25 - Clothing; footwear; headgear
41 - Education, entertainment, sporting and cultural services
Goods & Services
Paper goods, namely, [ brochures, ] magazines [ and booklets ] dealing with education, [ and postcards, wall, ] desk [ and pocket ] calendars, bumper stickers, notebooks [, writing paper and envelopes ] Clothing, namely, sweatshirts, T-shirts, tank tops, shorts, sweatpants, [ aprons and belts ] Educational services, namely, providing courses of instruction at the undergraduate, graduate [, and continuing education ] levels; educational library services; production of television and radio entertainment programs in the nature of [ lectures, musical concerts, theatrical performances, ] variety and talk shows, [ intramural sports and intercollegiate sports ]; entertainment in the nature of a wide variety of intramural and intercollegiate sports games; physical education services, namely, sports training programs
16 - Paper, cardboard and goods made from these materials
25 - Clothing; footwear; headgear
41 - Education, entertainment, sporting and cultural services
Goods & Services
Paper goods, namely, [ brochures, magazines and booklets dealing with education, and] postcards, wall, desk and pocket calendars, bumper stickers, notebooks, and writing paper [ and envelopes ] Clothing, namely, sweatshirts, T-shirts, tank tops, shorts [, sweatpants, aprons and belts ] Educational services, namely, providing courses of instruction at the undergraduate, and graduate [, and continuing education ] levels; educational library services; production of television and radio entertainment programs in the nature of lectures, musical concerts, theatrical performances, variety and talk shows, intramural sports and intercollegiate sports; entertainment in the nature of a wide variety of intramural and intercollegiate sports games; physical education services, namely, sports training programs
