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| Number | Title | Issue Date |
| 8094689 | Laser systems configured to output a spectrally-consolidated laser beam and related methods A laser apparatus includes a plurality of pumps each of which is configured to emit a corresponding pump laser beam having a unique peak wavelength. The laser apparatus includes a spectral beam combiner configured to combine the corresponding pump laser beams into a... | 01/10/2012 |
| 8073017 | System and method for generating eye-safe high intensity optical pulses with two backward-shifting raman cells A system and method for converting a pulsed beam of irradiation from a laser operating at a first wavelength to a pulsed beam of irradiation at a second, Stokes, wavelength. The system includes two Raman cells filled with the same Raman-active gas. The second cell r... | 12/06/2011 |
| 8036252 | Mid-infrared fiber laser using cascaded Raman wavelength shifting A mid-infrared system for optical probing is disclosed that comprises a mid-infrared fiber laser based on cascaded Raman wavelength shifting, a sample volume, and a detector or detection system. The cascaded Raman wavelength shifting process in optical fibers involv... | 10/11/2011 |
| 7991021 | Multimode raman fiber device with mode discrimination A multimode optical fiber has a core that includes radially dependent dopant materials to provide a desired refractive index profile and a desired Raman gain coefficient profile. A laser diode pump laser array provides high brightness light that is launched into the... | 08/02/2011 |
| 7991022 | Optical pulse amplification based on stimulated Raman scattering Techniques and apparatus for using stimulated Raman scattering in an optical gain medium to produce amplified laser pulses. ... | 08/02/2011 |
| 7949017 | Method and apparatus for generating high power visible and near-visible laser light A multimode-fiber Raman laser includes a pump source configured to provide optical radiation centered at a pump wavelength and characterized by a spectral bandwidth greater than 100 MHz and an oscillator resonant at an emission wavelength greater than the pump wavel... | 05/24/2011 |
| 7936795 | Cascade Raman laser The invention provides a cascade Raman laser including a pumping laser light source that generates pumping light, a cascade Raman resonator having an input-side optical reflector that receives the pumping light and selectively reflects light of each wavelength corre... | 05/03/2011 |
| 7869470 | Devices and methods for providing stimulated raman lasing Devices and methods for providing stimulated Raman lasing are provided. In some embodiments, devices include a photonic crystal that includes a layer of silicon having a lattice of holes and a linear defect that forms a waveguide configured to receive pump light and... | 01/11/2011 |
| 7869469 | Raman cell for high power applications A Raman shifter is provided with improved optical efficiency and robustness, particularly for high power applications. In one embodiment, a source system (100) includes a source pump laser (102) and a seed laser (104). Beams from the pump laser ... | 01/11/2011 |
| 7804863 | Laser system The invention concerns a laser system with a frequency comb generator for generating a comb of optical frequencies having an offset frequency and a plurality of equidistant modes. The laser system further preferably includes at least one stabilizer for stabilizing t... | 09/28/2010 |
| 7697576 | Cytological analysis by raman spectroscopic imaging Raman molecular imaging is used to differentiate between normal and diseased cells or tissue. For instance benign and malignant lesions of bladder and other tissues can be distinguished, including epithelial tissues such as lung, prostate, kidney, breast, and colon,... | 04/13/2010 |
| 7567593 | System and method for fractional Raman order pumping in optical communication systems An optical communication system includes a gain medium that is capable of receiving at least one optical signal that includes one or more optical signal wavelengths. The system also includes one or more pump sources that are capable of generating at least one pump s... | 07/28/2009 |
| 7420994 | Pulsed cascaded Raman laser A pulsed cascaded Raman laser (10) includes a pulsed light source (102) for generating a pulsed light (104) having an optical spectrum centered at a source wavelength. A non-linear Raman conversion fiber (106) is coupled to the pulsed lig... | 09/02/2008 |
| 7362497 | Optical fibre This invention relates to optical fibres, fibre lasers, fibre laser arrays and sensor systems comprising fibre laser arrays. Conventional fibre laser sensor arrangements comprise a plurality of fibre lasers arranged in series along a length of optical fibre. A pump ... | 04/22/2008 |
| 7355788 | Active optical fiber for Raman amplification A Raman amplification active optical fiber comprises a core containing silica oxide (SiO2), lithium oxide (Li2O), germanium oxide (GeO2), and barium oxide (BaO). The core contains 30 to 90 molar percent of SiO2 and less th... | 04/08/2008 |
| 7356218 | Variable demultiplexer A small variable demultiplexer capable of improving yield and stabilizing characteristics can be obtained. The small variable demultiplexer includes an SiO2 layer serving as a base medium, a waveguide array, a heater serving as an external refractive inde... | 04/08/2008 |
| 7355786 | Raman amplifying device and raman amplifying system A Raman amplifying device includes a plurality of Raman amplifiers having a gain wavelength characteristic with a gain peak at which an amplification gain becomes the largest, including a first Raman amplifier having a gain wavelength characteristic with a plurality... | 04/08/2008 |
| 7342711 | Method and contrivance for applying a Raman amplification in a transmission and/or fibre device Raman amplification is used in optical transmission systems, devices and/or components way of for applying Raman amplification avoiding or suppressing detrimental and hence undesirable non-linear effects is provided. Raman amplification in an optical device is provi... | 03/11/2008 |
| 7340143 | Semiconductor Raman variable optical attenuator/amplifier and equalizer A semiconductor-based optical amplifier/attenuator is disclosed. An apparatus according to aspects of the present invention includes an optical waveguide disposed in semiconductor material. A first optical beam having a first wavelength is to be directed through the... | 03/04/2008 |
| 7340136 | Multi-wavelength optical fiber The invention features a fiber that includes an optical fiber (110) containing a gain medium having a Raman active material with a Raman gain spectrum. The optical fiber is configured to receive energy at a wavelength λp. The fiber also includes a... | 03/04/2008 |
| 7339964 | Laser diode with phase matching grating A semiconductor diode laser that generates light at wavelengths longer than conventional diode lasers. The laser includes a first gain element that generates a first “pump” laser beam having a first optical frequency and a second gain element that generates a se... | 03/04/2008 |
| 7336685 | Laser irradiation apparatus, laser irradiation method, and method for manufacturing a semiconductor device YAG laser can simultaneously emit a plurality of laser beams having different wavelengths from each other. By simultaneously irradiating the laser beams having different wavelengths from each other to a same region of a non-single crystal semiconductor film, an inte... | 02/26/2008 |
| 7330301 | Inexpensive variable rep-rate source for high-energy, ultrafast lasers System for converting relatively long pulses from rep-rate variable ultrafast optical sources to shorter, high-energy pulses suitable for sources in high-energy ultrafast lasers. Fibers with positive group velocity dispersion (GVD) and self phase modulation are adva... | 02/12/2008 |
| 7327773 | Short-pulse laser device with a preferably passive mode coupling and multiple reflection telescope therefor The invention relates to a short-pulse laser device (11) with a preferably passive mode coupling. Said device comprises a resonator (12) which contains a laser crystal (14) in addition to several mirrors (M1-M7, OC) that define a l... | 02/05/2008 |
| 7317470 | Imaging device for a printing form and method for arranging optical components in the imaging device An imaging device (10) for a printing form (12), has at least one first and one second laser diode bar (14, 16), the laser diodes (18) on the laser diode bars (14, 16) being disposed in lines. The device includes a first and a seco... | 01/08/2008 |
| 7317854 | Waveguide and optical coupling device A waveguide including transmission areas which transmit an input optical signal. A coupling area is provided between the transmission areas and has a width narrower than a width of the transmission areas so that at least part of the optical signal transmitted throug... | 01/08/2008 |
| 7309867 | Methods and apparatus for characterization of tissue samples The invention provides methods for determining the probability that a given region of a tissue sample contains tissue of a given category, such as CIN 1 (cervical intraepithelial neoplasia, grade 1), CIN 2/3 (cervical intraepithelial neoplasia grades 2 and/or 3), no... | 12/18/2007 |
| 7310547 | Fluorescent fiberoptic probe for tissue health discrimination A system and method for the in situ discrimination of healthy and diseased tissue. A fiberoptic based probe is employed to direct ultraviolet illumination onto a tissue specimen and to collect the fluorescent response radiation. The response radiation is observed at... | 12/18/2007 |
| 7295739 | Coherent DUV illumination for semiconductor wafer inspection An apparatus for inspecting a specimen, such as a semiconductor wafer, is provided. The apparatus comprises a laser energy source, such as a deep ultraviolet (DUV) energy source and an optical fiber arrangement. The optical fiber arrangement comprises a core surroun... | 11/13/2007 |
| 7295365 | Optical gain flattening components, optical chips and optical amplifiers and methods employing same An optical component for gain-flattening multiplexed passband signals amplified with optical pump power, comprises a launch port optical waveguide operative to communicate multiplexed passband signals in a passband wavelength range and optical pump power in a differ... | 11/13/2007 |
| 7289203 | Method and system for spectral analysis of biological materials using stimulated cars A CARS system and method for probing a Raman signature of a sample are described. A short femtosecond pulse from one or more lasers is split into two pulses, a stimulus pulse and a probe pulse, whereby the probe pulse is time-delayed with respect to the stimulus pul... | 10/30/2007 |
| 7286574 | Infrared laser An infrared laser has a seed laser with an optical seed output. A pump amplifier receives the optical seed output and has an amplified output. A molecular gas laser receives the amplified output and has an infrared optical output. ... | 10/23/2007 |
| 7286283 | Optical fiber coupling arrangement Apparatus for optically pumping a clad amplifier fiber includes one or more transmission fibers arranged and configured to insert pump-light from a pump light source such as a diode-laser into the cladding of the amplifier fiber. The pump light propagates through th... | 10/23/2007 |
| 7282723 | Methods and apparatus for processing spectral data for use in tissue characterization The invention provides methods for processing tissue-derived spectral data for use in a tissue classification algorithm. Methods of the invention comprise application of spectral and/or image masks for automatically separating ambiguous or unclassifiable spectral da... | 10/16/2007 |
| 7280570 | Device for generating a light beam including multiple wavelengths A device for generating a light beam having several wavelengths includes a beam recombiner arrangement for recombining several laser light beams having different wavelengths. The beam recombiner arrangement includes several individual beam recombiners arranged in a ... | 10/09/2007 |
| 7277610 | Optical fiber and system containing same Optical fibers (e.g., fiber amplifiers and fiber lasers), and systems containing optical fibers (e.g., fiber amplifier systems and fiber laser systems) are disclosed. ... | 10/02/2007 |
| 7266258 | Two-photon absorption generated carrier lifetime reduction in semiconductor waveguide for semiconductor based raman laser and amplifier A semiconductor based Raman laser and/or amplifier with reduced two-photon absorption generated carrier lifetimes. An apparatus according to embodiments of the present invention includes optical waveguide disposed in semiconductor material and a diode structure disp... | 09/04/2007 |
| 7260248 | Image processing using measures of similarity The invention provides methods of relating a plurality of images based on measures of similarity. The methods of the invention are useful in the segmentation of a sequence of colposcopic images of tissue, for example. The methods may be applied in the determination ... | 08/21/2007 |
| 7259906 | System and method for voice control of medical devices A light source includes a wavelength shifter that is capable of shifting a shorter optical signal wavelength to a longer optical signal wavelength based at least in part on a Raman effect in a waveguide. The wavelength shifter includes a pump laser that operable to ... | 08/21/2007 |
| 7256929 | Semiconductor waveguide based high speed all optical wavelength converter A semiconductor-based all optical wavelength converter is disclosed. An apparatus according to aspects of the present invention includes an optical waveguide disposed in semiconductor material. An optical pump source is optically coupled to direct an optical pump be... | 08/14/2007 |
