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7623555 |
High power semiconductor laser diode
Semiconductor laser diodes, particularly high power ridge waveguide laser diodes, are often used in opto-electronics as so-called pump laser diodes for fiber amplifiers in optical communication...
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7620089 |
Surface-emitting type semiconductor laser
A surface-emitting type semiconductor laser includes: a lower mirror; an active layer formed above the lower mirror; and an upper mirror formed above the active layer, wherein the upper mirror...
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7602831 |
Semiconductor laser device having an insulation region
A semiconductor laser device includes a substrate having a first surface and a second surface opposite to the first surface, an active region formed on the second surface of the substrate, a...
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7574026 |
Method for the 3d modeling of a tubular structure
The invention provides a method for 3D modeling of a three-dimensional tubular structure of an examination object from 2D projection images (D) of the structure taken from different projection...
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7564883 |
Optical semiconductor device and method for fabricating the same
The optical semiconductor device comprises a lower clad layer 12 , optical waveguide layers 14, 16, 18 including an active layer for recombining the carriers. The upper clad layer 20 is mesa...
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7555023 |
Quasi-synchronously pumped lasers for self-starting pulse generation and widely tunable systems
A laser system for generating self-starting few cycle laser pulses or widely tunable laser pulses is provided. The laser system includes a modelocked pump source that provides a pulsed pump signal....
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7545843 |
Ultra-high Q micro-resonator and method of fabrication
A micro-cavity resonator including a micro-cavity capable of high and ultra-high Q values and a silicon substrate. Portions of the silicon substrate located below a periphery of the micro-cavity...
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7542489 |
Injection seeding employing continuous wavelength sweeping for master-slave resonance
A method for effective injection seeding is based on continuous wavelength sweeping for matching the injected seeds with one or more longitudinal mode(s) of the slave oscillator in every pump...
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7535628 |
Laser light source, method of laser oscillation, and method of laser processing
A laser light source includes a light source section for outputting pulse laser light λ 1 , λ 2 with a mutually identical repetition frequency, an optical amplification section for amplifying...
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7526004 |
Mode-locked laser apparatus
A mode-locked laser apparatus includes a resonator (laser cavity), a mode-locking device placed in the resonator, a solid-stated laser medium that is doped with Yb (ytterbium) and placed in the...
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7519092 |
Tunable laser source with optical wavelength addressing
An optical apparatus including a tunable master laser from which all or some of a beam is injected into at least one “slave ” laser having a cavity with an amplifier medium and a dynamic...
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7519091 |
All-optical 2R regenerator using self-seeded laser diode
The present invention is a self-seeded laser diode. The laser diode obtains a gain by itself without using expansive erbium-doped fiber amplifiers. Hence, the cost is reduced and the system is...
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7483470 |
Semiconductor laser capable of coupling with single mode optical fiber at high coupling efficiency
A semiconductor laser includes a substrate made of InP, an active layer including a multiquantum well structure, which is formed in a width of 7 to 14 μm on the substrate, and an n-type cladding...
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7480316 |
Geodesic device comprising a laser source
A laser source is used in a geodesic device to improve the emission of laser light, in which the laser diodes emitting multimodal radiation are influenced by a mode-selective component such that...
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7443891 |
Widely tunable laser
A Fabry-Perot laser and a micro-actuator are utilized to provide continuous tuning over a range of wavelengths.
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7426222 |
Laser apparatus
A laser apparatus is disclosed. An optical element receives at least a part of laser light emitted from a laser generation source and generates interference fringes. Each of first and second...
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7418205 |
Method and apparatus for controlling a frequency hopping laser
An optical spread spectrum communication system includes a tunable laser which sequentially outputs optical signals having different wavelengths. The laser produces a frequency spectrum having a...
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7382808 |
Apparatus and method for spatial mode selection of planar waveguide and thin slab lasers in the large cross section size direction
A method and apparatus for spatial mode selection of planar waveguide and thin slab lasers in the laser's large cross section size direction. The planar laser has a small cross section size...
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7362784 |
Laser irradiation method, laser irradiation apparatus, and semiconductor device
An object of the present invention is obtaining a semiconductor film with uniform characteristics by improving irradiation variations of the semiconductor film. The irradiation variations are...
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7286578 |
High-power diode laser system
A diode laser system having a diode amplifier member with a large transverse gain area. The diode amplifier member includes an amplifying medium for amplifying a number of spatial modes of a...
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7266135 |
Method for producing laser with resonant reflector
In one exemplary embodiment of the invention, a method is employed that is directed to forming a resonant reflector on an optoelectronic device, such as a semiconductor laser for example. The...
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7260122 |
Modeless wavelength-agile laser
An external cavity laser may be swept rapidly in frequency and cavity length to prevent formation of modes providing improved spectral response and light characteristics.
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7188033 |
Method and system of computing and rendering the nature of the chemical bond of hydrogen-type molecules and molecular ions
Provided is a system of computing and rendering a nature of a chemical bond based on physical, Maxwellian solutions of charge, mass, and current density functions of hydrogen-type molecules and...
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7177330 |
Method and apparatus for controlling the polarization of an optical signal
A method of controlling the state of polarization of an optical signal includes injecting the optical signal into a laser diode and matching the wavelength of the optical signal to a longitudinal...
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7167312 |
Beam shaping optics and module for a diode laser arrangement
A beam shaping optical arrangement combines three incoming laser beams that are mutually laterally offset in two orthogonal directions (X and Y), including an incoming first central laser beam and...
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7167489 |
GaN-based semiconductor laser device
According to an aspect of the present invention, a nitride semiconductor laser device includes a nitride semiconductor active layer, and a stripe-shaped waveguide for guiding light generated in the...
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7155131 |
Optical communication devices, light emission devices and optical communication methods
The invention relates to optical communication devices, light emission devices and optical communication methods. Aspects of the present invention provide methods and devices enable provision of...
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7142568 |
High-power blue and green light laser generation from high-powered diode lasers
A device for generating blue or green laser light, comprising an infrared high power semiconductor laser or an infrared high power semiconductor laser bar or array, a diffractive optical device,...
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7133427 |
Phase conjugate laser and method with improved fidelity
A spatial filter adapted to increase the angular spread of non-conjugated energy in a beam and suppress this energy to improve the efficiency of a phase conjugate system. In the illustrative...
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7099356 |
Robust seeding technique for single mode laser oscillation
A method is provided for seeding laser system ( 10 ) for single longitudinal mode oscillation. The method includes coupling laser system ( 10 ) to be seeded for single mode output to a seed laser...
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7095769 |
Semiconductor laser diode with higher-order mode absorption layers
A semiconductor laser diode capable of achieving an improvement in kink level and an improvement in catastrophic optical damage (COD) level. The semiconductor laser diode includes a...
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7095761 |
DPSS laser
Disclosed is a side pumping type DPSS (Diode Pumped Solid-State) laser having a high efficiency of pumping light together with a large output of the laser power. The DPSS laser includes a first...
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7092425 |
VCSEL device with improved modal properties
Using lateral physical modulation, the optical properties of VCSELs can be stabilized and controlled by spatially varying the characteristics of the device material. This results in stabilization...
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7088746 |
Laser module
Provided is a fiber grating laser for optical communication which can be used as a light source regardless of the occurrence of mode hopping. The laser module comprises a semiconductor optical...
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7088745 |
Laser system with external optical feedback and use of such system in the graphical industry
A diode laser system providing a high-power laser beam with good spatial coherence, which can be focused to a small spot size over long distances and which has a good pointing stability. The laser...
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7085301 |
Photonic crystal single transverse mode defect structure for vertical cavity surface emitting laser
The invention is directed to a photonic crystal defect structure for a vertical cavity surface emitting laser (VCSEL). In accordance with the invention, a set of holes is formed in a pattern with...
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7079558 |
Mode-locked laser method and apparatus
A method and apparatus for stabilizing the output of a mode-locked laser by monitoring the temporal behavior of the pulse train profile and controlling the laser cavity optical length and/or loss...
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7065107 |
Spectral beam combination of broad-stripe laser diodes
A method and apparatus for improving the beam quality of the emissions from a multimode gain medium such as a broad-stripe laser through the use of SBC techniques is provided. In order to achieve...
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7061945 |
VCSEL mode-transforming phase filter with enhanced performance
A vertical cavity surface emitting laser (VCSEL) in which a higher order lasing mode produces a Gaussian-like single mode far field beam intensity pattern. Such a VCSEL includes a protective...
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7009679 |
Chiral boardband tuning apparatus and method
A chiral structure having an expanded adjustable reflection band to provide broadband tunability is provided. In the preferred embodiment, the chiral structure is implemented as a chiral fiber...
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6996139 |
Integrated-optics coupling component, designed to adapt a light source to a guided optics element and power laser comprising same
The integrated-optics coupling component is designed to cooperate with a transverse multimode power laser diode ( 2 ) with semi-conductor to form a transverse multimode power laser. It comprises an...
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6982997 |
Single-frequency narrow linewidth 1μm fiber laser
A compact single frequency, single-mode 1 μm fiber laser with narrow linewidth (<10 kHz) and high output power (>2 mW) is formed with an oxide-based multi-component glass fiber doped with...
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6970484 |
Laser tuning by spectrally dependent spatial filtering
A tunable laser and laser tuning method, based on the interaction of a spectrally dependent beam distortion and a spatial filter within a laser cavity. One embodiment of this laser is an external...
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6970494 |
Rare-earth doped phosphate-glass lasers and associated methods
Apparatus and method for integrating lasers and optics on glass substrates. An optical (e.g., laser) component formed from a glass substrate doped with a optically active lanthanides species with a...
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6959027 |
High-power coherent arrays of vertical cavity surface emitting lasers
A high-power coherent array of Vertical Cavity Surface Emitter Lasers is described in which a plurality of Vertical Cavity Surface Emitting Lasers (VCSELs) are provided along with a structure which...
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6956877 |
Means of suppression of non-Bragg side modes
A single longitudinal mode laser, such as a distributed feedback laser, that comprises a filter. The filter selectively attenuates wavelengths that are lower than the wavelength of the laser's...
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6950452 |
Semiconductor laser module and method for simultaneously reducing relative intensity noise (RIN) and stimulated brillouin scattering (SBS)
A semiconductor laser module including a semiconductor laser device having an integrated diffraction grating configured to output a multiple mode laser beam in the presence of a driving current, an...
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6937628 |
Optical transmitter modules
A subject of the invention is to reduce the temperature dependence of an etalon as a wavelength locker for a semiconductor laser device and so forth. Concretely, it is to restrict the lowering of...
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6934311 |
Semiconductor laser module and Raman amplifier
A semiconductor laser module has a Fabry-Perot type semiconductor laser device, an optical fiber, and first and second lenses. The tip of the optical fiber, on which the laser beam falls, is askew...
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6912239 |
Distributed feedback laser device
A distributed feedback laser device inhibiting beam coupling coefficient variation resulting from fabrication dispersion and improving fabrication yield. The distributed feedback laser device...
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