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| Number | Title | Issue Date |
| 8116348 | Gas laser device A gas laser device is presented that produces a near diffraction limited round beam exiting the discharge vessel. Through the use of a simple focusing system, additional waveguide strip and a spatial filter in conjunction with the new asymmetric hybrid planar wavegu... | 02/14/2012 |
| 8009715 | Mode selection technique for a laser A mode selection technique in a laser is described wherein a recess is formed in a surface of a waveguide in the laser. The recess provides a region of free space propagation within the waveguide which preferentially selects the lowest order mode. A mode selective R... | 08/30/2011 |
| 8000370 | Laser-induced optical wiring apparatus A laser-induced optical wiring apparatus includes a substrate, first and second light-reflecting members provided on the substrate separately from each other, an optical waveguide provided on the substrate for optically coupling the first and second light-reflecting... | 08/16/2011 |
| 7835415 | Single longitudinal mode laser diode A single-mode, etched facet distributed Bragg reflector laser includes an AlGaInAs/InP laser cavity, a front mirror stack with multiple Fabry-Perot elements, a rear DBR reflector, and a rear detector. The front mirror stack elements and the rear reflector elements i... | 11/16/2010 |
| 7773657 | Laser-induced optical wiring apparatus A laser-induced optical wiring apparatus includes a substrate, first and second light-reflecting members provided on the substrate separately from each other, an optical waveguide provided on the substrate for optically coupling the first and second light-reflecting... | 08/10/2010 |
| 7656927 | Optical semiconductor element and optical semiconductor device An optical semiconductor device includes an optical semiconductor element, a metal pattern and at least one thermal conductive material. The optical semiconductor element has a first optical waveguide region and a second optical waveguide region. The second optical ... | 02/02/2010 |
| 7492804 | Near-field light emitting device and data recording/reproduction apparatus A near-field light emitting device includes a deflecting unit that deflects electromagnetic waves propagated through a core toward a base. A propagating unit arranged on the base emits near-field light from an outlet. By providing a magnetic head on a side opposite ... | 02/17/2009 |
| 7477672 | Mitigation of photodarkening to achieve laser oscillation and amplification with highly doped fibers Photodarkening in active fiber or waveguide devices (e.g. lasers, amplifiers, and incoherent sources such as ASE sources) can be reduced by altering the dopant concentration along the length of the doped fiber. A fiber or waveguide device includes two or more intent... | 01/13/2009 |
| 7421002 | Laser-induced optical wiring apparatus A laser-induced optical wiring apparatus includes a substrate, first and second light-reflecting members provided on the substrate separately from each other, an optical waveguide provided on the substrate for optically coupling the first and second light-reflecting... | 09/02/2008 |
| 7421001 | External cavity optoelectronic device A device contains at least one leaky waveguide layer, and has a transparent substrate, having a higher refractive index. The leakage loss of the waveguide exceeds the modal gain needed to initiate waveguide lasing. The leaky emission is going into the substrate at a... | 09/02/2008 |
| 7408966 | Intersubband quantum box stack lasers The present invention provides semiconductor lasers having an Active-Photonic-Crystal (APC) structure that allows scaling of the coherent power by using a waveguide having a periodic structure that selects operation in a single spatial mode from large-aperture devic... | 08/05/2008 |
| 7382817 | V-coupled-cavity semiconductor laser A semiconductor laser comprises two optical cavities, each comprising an optical waveguide bounded by two partially reflecting elements. The two optical waveguides are disposed on a substrate to form a substantially V-shaped geometry with substantially no cross-coup... | 06/03/2008 |
| 7373062 | Hollow core optical fiber An optical fiber comprises a hollow fiber core, wherein the front faces of both fiber ends of the hollow fiber core are open and each fiber end is surrounded by a protection element in a dustproof fashion. The protection element includes a window at its front face i... | 05/13/2008 |
| 7366385 | Tunable fiber amplifier and laser The present invention has a core and at least one cladding, where, by changing the temperature of the cladding, the material dispersion characteristic of the cladding is changed and a refractive index is varied to make fundamental-mode cutoff tunable as well; and th... | 04/29/2008 |
| 7342951 | Laser diode with a frequency converter A semiconductor laser diode that internally converts one or more short wavelength “pump” beams to an output beam at a longer wavelength using nonlinear optical frequency conversion in the semiconductor. Modal phase matching of the pump and output beams in a semi... | 03/11/2008 |
| 7339714 | Variable blazed grating based signal processing A light processing system includes an array of optical signal processing devices. The array of processing devices are operable to receive at least some of a first signal part and to modulate the first signal part based at least in part on a control signal received f... | 03/04/2008 |
| 7339960 | Optical device, laser beam source, laser apparatus and method of producing optical device After forming domain inverted layers 3 in an LiTaO3 substrate 1, an optical waveguide is formed. By performing low-temperature annealing for the optical wavelength conversion element thus formed, a stable proton exchange layer 8 is fo... | 03/04/2008 |
| 7339974 | Tunable semiconductor laser A tunable semiconductor laser includes gain medium, wavelength-selective element and a laser mode matching element. The wavelength-selective element comprises a first light absorbing plate operatively coupled to the laser mode matching element and provided with an a... | 03/04/2008 |
| 7331722 | Optical module for housing an optical component An optical module for housing an optical component to which optical fibers are to be connected, the optical module comprises a casing; at least two round fiber guides which are arranged within the casing, spaced at a distant from each other and around which the opti... | 02/19/2008 |
| 7327771 | WDM-PON system with optical wavelength alignment function A PLC-based wavelength-tunable WDM-PON system with an optical wavelength alignment function, the WDM-PON system comprises: a PLC platform formed on a silicon substrate; a semiconductor chip comprising an active region generating light and a passive region located in... | 02/05/2008 |
| 7319709 | Creating photon atoms A narrow linewidth fluorescent emitter can incorporate a chromophore into a microcavity that can support low-order optical modes. ... | 01/15/2008 |
| 7317746 | Method and device for passive alignment The present invention is related to a method and device for precision and passive alignment such as precision and passive alignment technology for low cost array fibre access components. A laser carrier is passively aligned to an MT-interface using alignment structu... | 01/08/2008 |
| 7305186 | Method and apparatus for scheduling communication using a star switching fabric In one embodiment, a scheduler for use with a star switching fabric includes a scheduling star switching fabric operable to receive a plurality of packets each associated with one of a plurality of wavelengths and a plurality of selecting elements associated with th... | 12/04/2007 |
| 7295580 | Numerical aperture optimization using doped cladding layers A method and apparatus for optimizing the numerical aperture (NA) of a laser active core. The laser active core comprises at least a first and second cladding pair. The first and second cladding pair have at least one NA value. At least one of the first and second c... | 11/13/2007 |
| 7282798 | Spontaneous emission enhanced heat transport method and structures for cooling, sensing, and power generation A method and structure for heat transport, cooling, sensing and power generation is described. A photonic bandgap structure (3) is employed to enhance emissive heat transport from heat sources such as integrated circuits (2) to heat spreaders (4... | 10/16/2007 |
| 7279718 | LED including photonic crystal structure A photonic crystal light emitting diode (“PXLED”) is provided. The PXLED includes a periodic structure, such as a lattice of holes, formed in the semiconductor layers of an LED. The parameters of the periodic structure are such that the energy of the photons, em... | 10/09/2007 |
| 7274722 | COslab laser CO2 slab laser having a gas-filled tubular housing, sealed off at both ends by end pieces, which accommodates two overlapping electrodes extending into the tubular housing and mirrors arranged in the region of the electrodes, where each of the two end pie... | 09/25/2007 |
| 7263288 | Optical routing using a star switching fabric In one embodiment, a router includes a plurality of line cards each operable to receive at least one packet comprising an identifier associated with a destination element external to the router. Each line card includes a look-up table operable to facilitate routing ... | 08/28/2007 |
| 7263116 | Dielectric coupled COslab laser A slab laser includes two elongated electrodes arranged spaced apart and face-to-face. Either one or two slabs of a solid dielectric material extend along the length of the electrodes between the electrodes. A discharge gap is formed either between one of the electr... | 08/28/2007 |
| 7260128 | Semiconductor laser device, semiconductor laser system, optical pickup module and manufacturing for semiconductor laser system A semiconductor laser device comprises an n-type cladding layer 103 made of n−type (Al0.3Ga0.7)0.5In0.5P, an undoped active layer 104 and a first p-type cladding layer 105 made of p... | 08/21/2007 |
| 7260134 | Dielectric coupled COslab laser An slab CO2 laser includes spaced-apart elongated slab electrodes. A lasing gas fills a discharge gap between the electrodes. An RF power supply is connected across the electrodes and sustains an electrical discharge in the lasing gas in the discharge gap. Either on... | 08/21/2007 |
| 7260655 | Optical routing using star switching fabric with reduced effective switching time In one embodiment, a router includes a star switching fabric operable to receive a plurality of optical signals each having a wavelength and each associated with a payload received by the router and to communicate from the switching fabric a plurality of substantial... | 08/21/2007 |
| 7251389 | Embedded on-die laser source and optical interconnect An apparatus and method for embedding a laser source on a semiconductor substrate and an optical interconnect to couple the laser source to internal components of the semiconductor substrate. An on-die waveguide is integrated on the semiconductor substrate. A packag... | 07/31/2007 |
| 7248614 | Laser beam generating unit A laser beam generating unit has a semiconductor laser unit having a plurality of beam emitting portions located in the shape of a matrix, and a plurality of optical fibers for individually transmitting laser beam emitted from the beam emitting portions. An optical ... | 07/24/2007 |
| 7248615 | Electrically-activated photonic crystal microcavity laser A microcavity structure includes a first waveguide that includes a first photonic crystal microcavity. A second waveguide includes a second photonic crystal microcavity. A microcavity active region is created by overlapping the first and second microcavities. ... | 07/24/2007 |
| 7230503 | Imbalanced differential circuit control A differential circuit includes first and second side circuits which are coupled to receive control signals in such a way as to introduce an intentional imbalance in the differential circuit for certain benefits discussed herein. An exemplary pseudo-differential LC ... | 06/12/2007 |
| 7230967 | Waveguide laser A laser waveguide, where the laser waveguide can be formed by electrodes and at least one sidewall in a manner allowing a more compact structure than previously provided. Protrusions in the electrodes allow easier laser starts, and sectional sidewall(s) allow easier... | 06/12/2007 |
| 7227880 | Grating-stabilized semiconductor laser A grating-stabilized semiconductor laser comprises a semiconductor laser gain medium, an integrated low-index waveguide, and a waveguide grating segment providing optical feedback for laser oscillation. The laser may be adapted for multi-mode or single-mode operatio... | 06/05/2007 |
| 7224875 | Semiconductor optical device integrated with a photo detector The present invention provides a semiconductor optical device 1 that includes a photodiode capable of monitoring front light of the light-emitting device. The optical device 1 includes a photodiode 3, which is formed on a substrate 7 and ... | 05/29/2007 |
| 7220256 | Laser system and method for treatment of biological tissues A system for and method of performing laser assisted surgery is disclosed. Laser radiation is preferably delivered to a target area of tissue using a Er:YAG laser source. The laser radiation is delivered to the target area in bursts of laser radiation comprising set... | 05/22/2007 |
