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8902945 Semiconductor laser gain device with mode filter  
A semiconductor gain device comprising a substrate; an optical waveguide layer extending from a first end of the substrate to a second end of the substrate opposite to the first end, the optical...
8902940 Light source control method  
The present invention relates to a light source control method capable of decreasing the dependence of a pulse width (FWHM) of an output pulsed light on a repetition frequency. A pulsed light...
8902939 Broadly tunable optical parametric oscillator  
A novel broadly tunable optical parametric oscillator is described for use in numerous applications including multi-photon microscopy. The optical parametric oscillator includes at least one...
8902946 Photonic crystal surface-emitting lasers enabled by an accidental Dirac point  
A photonic-crystal surface-emitting laser (PCSEL) includes a gain medium electromagnetically coupled to a photonic crystal whose energy band structure exhibits a Dirac cone of linear dispersion at...
8902941 Methods and apparatus for swept-source optical coherence tomography  
In one embodiment of the invention, a semiconductor optical amplifier (SOA) in a laser ring is chosen to provide low polarization-dependent gain (PDG) and a booster semiconductor optical...
8902495 Laser or amplifier optical device pumped or seeded with nonlinearly generated light  
An optical source configured for providing output light for providing input signal light or pump light can comprise pump source for pumping a four wave mixing (FWM) process with light pulses (“FWM...
8897329 Group III nitride-based green-laser diodes and waveguide structures thereof  
Group III nitride-based laser diodes comprise an n-side cladding layer formed of n-doped (Al,In)GaN, an n-side waveguide layer formed of n-doped (Al)InGaN, an active region, a p-side waveguide...
8897330 Surface emitting laser, surface-emitting-laser array, and image forming apparatus  
The present invention provides a surface emitting laser that provides a sufficient optical output and is suitable as a light source intended for electrophotographic apparatuses, and a...
8896912 Chirped quasi phase-matched optical parametric amplifier/difference frequency generator (CQPM OPA/DFG)-based optical tuning method, apparatus, and applications  
A method for wavelength tunable output from a broadband spectrum using a quasi phase-matched optical parametric amplifier/difference frequency generator (CQPM OPA/DFG)-based apparatus involves...
8897325 Fiber laser  
A fiber laser having a ring resonance path comprises a pump light source, a Yb-doped optical fiber and a light modulation unit. The pump light source emits a pump light. The Yb-doped optical fiber...
8897327 Laser diode devices  
A laser diode device including a housing having a mounting area in a cavity of the housing, at least one laser diode chip that emits electromagnetic radiation through a radiation exit area during...
8897328 Semiconductor laser apparatus and method for manufacturing same  
The semiconductor laser device of the present invention has a conductive first heatsink member, a conductive first adhesive, and a semiconductor laser element. The first adhesive is disposed on...
8897326 Pump energy wavelength stabilization  
In a method, a gain medium is provided having an absorption coefficient that varies with wavelength. An absorption coefficient curve of the absorption coefficient or a range of wavelengths...
8897334 Light emitting device  
A light emitting device includes first and second electrodes, a semiconductor laser element, a bonding wire, a transparent frame section, and a lid section. The first electrode includes a convex...
8896911 Laser system  
The present invention is a laser system including a DFB laser 10 emitting a laser light 50, a semiconductor optical amplifier 20 that modulates an intensity of the laser light, and a harmonic...
8895335 Impurity-induced disorder in III-nitride materials and devices  
A method for impurity-induced disordering in III-nitride materials comprises growing a III-nitride heterostructure at a growth temperature and doping the heterostructure layers with a dopant...
8897333 CO2 laser  
Efficient laser diode excited Thulium (Tm) doped solid state systems, directly matched to a combination band pump transition of Carbon Dioxide (CO2), have matured to the point that utilization of...
8896915 Axial walk off multi-pass amplifiers  
The various laser architectures described herein provide increased gain of optical energy as well as compensation of optical phase distortions in a thin disk gain medium. An optical amplifier...
8896913 Method and system for compact, multi-pass pulsed laser amplifier  
A laser amplifier includes an input aperture operable to receive laser radiation having a first polarization, an output aperture coupled to the input aperture by an optical path, and a polarizer...
8897332 Circular optical cavity electronically switched between at least two distinct cavity modes  
A laser cavity structure is disclosed which pertains to laser resonator geometries possessing circular symmetry, such as in the case of disk or spherical lasers. The disclosed invention utilizes a...
8897331 Lasing device  
Upon starting the lasing device after having a stop state, gas retaining in the gas circulation path and the optical resonator is released through the gas release valve opened by the gas pressure...
8897652 Optical transmission circuit and optical transmission/reception circuit module  
An optical transmission circuit comprises a light emitting element and a differential amplifier circuit to which differential input signals are input to modulate an optical output of the light...
8891571 Vertical cavity surface emitting laser device, vertical cavity surface emitting laser array, optical scanning apparatus, image forming apparatus, optical transmission module and optical transmission system  
A disclosed vertical cavity surface emitting laser device emits light orthogonally in relation to a substrate and includes a resonator structure including an active layer; and semiconductor...
8891576 High SMSR unidirectional etched lasers and low back-reflection photonic device  
Unidirectionality of lasers is enhanced by forming one or more etched gaps (78, 80) in the laser cavity. The gaps may be provided in any segment of a laser, such as any leg of a ring laser, or in...
8891566 System and method for providing chirped electromagnetic radiation  
A system and method for controllably chirping electromagnetic radiation from a radiation source includes an optical cavity arrangement. The optical cavity arrangement enables electromagnetic...
8891577 System and method for a micro ring laser  
A system and method for an electrically pumped laser system is disclosed. The system includes a silicon micro-ring resonator 405. A quantum well 412 formed of a III-V group semiconductor material...
8891159 Optical semiconductor element, semiconductor laser, and method of manufacturing optical semiconductor element  
An optical semiconductor element includes: a grating base layer including a projection-recess structure disposed over a substrate; and a grating cover layer including a group III-V semiconductor...
8891572 Semiconductor laser device having reflecting and emitting surfaces  
A semiconductor laser device has structure including: a semiconductor laser chip having an emission surface and a reflection surface which are opposing end surfaces of a resonator; and a...
8891157 Acousto-optic deflectors over one octave  
The technology described applies an extended frequency range of over one octave to drive an acousto-optic deflector, thereby defying a design rule of thumb that limited bandwidth to just under one...
8891563 Multi-chip OPS-laser  
A two-chip OPS laser includes first and second OPS-chips each emitting the same fundamental wavelength in first and second resonators. The first and second resonators are interferometrically...
8891579 Laser diode apparatus utilizing reflecting slow axis collimators  
A laser diode apparatus including a mounting block, a plurality of diode lasers mounted to the mounting block and each capable of emitting a respective diode laser beam, and a plurality of...
8891573 6.1 angstrom III-V and II-VI semiconductor platform  
Use of semiconductor materials having a lattice constant of within +/−1.6% of 6.1 angstroms facilitates improved semiconductor device performance and new semiconductor structures, for example...
8891580 Resonator mounting assembly for isolation of resonator defining optics  
A resonator mounting assembly includes a resonator cage, a base underlying the resonator cage, a plurality of first sets of kinematic mounting elements with the kinematic mounting elements of each...
8891565 Pulse light source  
The pulse light source comprises a semiconductor laser outputting pulse light, an optical filter, and an optical amplifier. The optical filter outputs a chirping component of the inputted pulse...
8891562 Tuneable laser source  
Described herein is a laser (1) having a cavity for supporting oscillation of an electromagnetic signal to provide lasing action. A gain element (5) provides a source of stimulated emission for...
8891581 Multi-wavelength semiconductor laser device  
A multi-wavelength semiconductor laser device includes a block having a V-shaped groove with two side faces extending in a predetermined direction; and laser diodes with different light emission...
8891564 Femtosecond laser apparatus and femtosecond laser system including the same  
There is disclosed a femtosecond laser apparatus including a first laser material comprising Ng, Np and Nm axes spatially perpendicular to each other; a second laser material comprising Np axis,...
8891574 Polarization purity control device and gas laser apparatus provided with the same  
A degree of polarization control device includes: a calcium fluoride crystal substrate for transmitting a laser beam;a polarization monitor for measuring the degree of polarization of a laser beam...
8891578 Optical semiconductor device having diffraction grating disposed on both sides of waveguide and its manufacture method  
An active layer (18) is formed over a semiconductor substrate having a pair of facets (15A, 15B) mutually facing opposite directions. An upper cladding layer (19) is formed on the active layer,...
8891575 Optical feedback structures and methods of making  
An optical resonator can include an optical feedback structure disposed on a substrate, and a composite including a matrix including a chromophore. The composite disposed on the substrate and in...
8891158 Distributed thermal system for nonlinear optical frequency conversion  
A laser frequency converter includes a first substrate material forming a first planar surface that includes a first nonlinear material situated along a portion of the first planar surface of the...
8891567 Heat sink for a pulsed high-power laser diode  
A semiconductor laser module having a substrate and having at least one semiconductor laser situated on the substrate, the substrate having a layer structure which includes at least one primary...
8891569 VCSEL array with increased efficiency  
The present invention relates to a VCSEL array comprising several VCSELs arranged side by side on a common substrate (1). Each VCSEL is formed of at least a top mirror (5, 14), an active region...
RE45249 System method and apparatus for selecting and controlling light source bandwidth  
The bandwidth selection mechanism includes a first actuator mounted on a second face of a dispersive optical element, the second face being opposite from a reflective face, the first actuator...
8889251 Alkali resistant optical coatings for alkali lasers and methods of production thereof  
In one embodiment, a multilayer dielectric coating for use in an alkali laser includes two or more alternating layers of high and low refractive index materials, wherein an innermost layer...
8891568 Laser diode device and method of manufacturing laser diode device  
A laser diode device includes: a semiconductor substrate including a semi-polar surface, the semiconductor substrate being formed of a hexagonal III-nitride semiconductor; an epitaxial layer...
8891570 Optical semiconductor device  
In a BH laser which uses InGaAlAs-MQW in an active layer, Al-based semiconductor multi-layer films including an InP buffer layer and an InGaAlAs-MQW layer, and an InGaAsP etching stop layer are...
8885682 Terahertz wave emission laser device with a perforated structure  
A laser device for emitting THz waves includes a heterostructure with a substantially cylindrical shape including a first layer in an optically nonlinear semiconductor material including emitters...
8884209 Light determination circuit  
A light determination circuit having a laser module and a detection circuit is provided. The detection circuit comprises a threshold voltage determination unit, a comparison unit and a switch...
8885246 Device for extending the service life of a non-linear optical system subjected to the radiation of an intense laser beam and non-linear optical source including said device  
A device for extending the lifetime of a frequency-converting non-linear optical system (19) subjected to the radiation of an intense laser beam includes two plates (2, 3) with flat and parallel...