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| Number | Title | Issue Date |
| 6563854 | Integrated external diode laser module particularly suited to Raman spectroscopy An external cavity diode laser system which finds utility in many application areas, is particularly suited to fiber-coupled Raman Spectroscopy. A holographic transmission grating is disposed in the optical path to transmit elements of the beam having the... | 05/13/2003 |
| 6560259 | Spatially coherent surface-emitting, grating coupled quantum cascade laser with unstable resonance cavity A surface emitting, unipolar, quantum cascade semiconductor laser is constructed of a multilayer semiconductor structure on a substrate. The laser has doped semiconductor material only of one conductivity type. The laser includes a core region having a la... | 05/06/2003 |
| 6560249 | Laser source with integral filtering of the amplified spontaneous emission Laser source comprising a first active arm extending from a first end reflector up to a dispersing system grid and containing an amplifier medium that produces a first luminous beam. A second passive arm extends from the grid to a second end reflector, th... | 05/06/2003 |
| 6556611 | Wide stripe distributed bragg reflector lasers with improved angular and spectral characteristics A diode laser comprises a laser cavity defining a linear optical-path axis, and a current-pumped stripe region, said current-pumped stripe region being disposed within said laser cavity. The laser cavity includes an output surface perpendicular to the opt... | 04/29/2003 |
| 6556597 | Laser diode module A laser diode module includes a laser diode, a lens located on an optical path of light emitted from the laser diode, and an optical fiber located to receive the emitted light concentrated by the lens. The optical fiber includes a fiber grating having a r... | 04/29/2003 |
| 6541297 | Method for fabricating semiconductor device and semiconductor device The method for fabricating a semiconductor device of this invention includes the step of: forming a first compound semiconductor layer by crystal growth on a surface of a semiconductor substrate which includes a plurality of crystal planes having differen... | 04/01/2003 |
| 6535308 | Method and apparatus for converting electrical signals and optical signals for bidirectional communication over a single optical fiber Circuitry for controlling a diode optically coupled to an optical fiber suitable for transmitting digital light signals therethrough. The circuitry includes a temperature compensated driver when operating in the transmit mode and receiving circuitry for c... | 03/18/2003 |
| 6534798 | Surface plasmon enhanced light emitting diode and method of operation for the same The emission properties of light-emitting diodes are enhanced by coupling to surface plasmons. The semiconductor emitter layer of the light-emitting diode is thinner than λ/2 and is sandwiched between two metal films. A periodic pattern is defined in the... | 03/18/2003 |
| 6532247 | Laser wavelength control unit with piezoelectric driver An electric discharge laser with fast wavelength correction. Fast wavelength correction equipment includes at least one piezoelectric drive and a fast wavelength measurement system and fast feedback response times. In a preferred embodiment, equipment is ... | 03/11/2003 |
| 6529542 | Incoherent beam combined optical system utilizing a lens array A method and apparatus is provided that enables an IBC system to operate over a large field angle. As a consequence, wide laser gain arrays can be used providing greater control over the output power and the bandwidth of the IBC system. The IBC resonator ... | 03/04/2003 |
| 6529327 | Partly reflecting optical component and laser source incorporating such a component A partially reflecting optical component (11) generating, from an incident beam (12), two secondary beams, one of them being reflected (13), the other one being transmitted (14). According to the invention, it comprises a first wholly reflecting planar fa... | 03/04/2003 |
| 6526071 | Tunable laser transmitter with internal wavelength grid generators The present invention provides a continuously tunable external cavity laser (ECL) with a compact form factor and precise tuning to a selected center wavelength of a selected wavelength grid. The ECL may thus be utilized in telecom applications to generate... | 02/25/2003 |
| 6522681 | Laser for the generation of narrow band radiation A laser is disclosed for generating radiation having narrow band width and high spectral purity. The laser comprises a cavity (10) containing a lasing medium (12) in between two reflective elements (14, 16) and at least one wavelength-selective element (1... | 02/18/2003 |
| 6519269 | Wavelength tuneable laser source A wavelength tuneable laser source with an external cavity and utilizing an interferometer having a reciprocal output and a non-reciprocal output. The laser source includes an amplifier medium, a cavity comprising two reflectors and a source beam extracti... | 02/11/2003 |
| 6515741 | Optical device and method for line-narrowed excimer or molecular fluorine laser An apparatus and method for testing the quality of a line narrowing and/or selection module that has been particularly assembled for use with a line-narrowed excimer or molecular fluorine laser is described. The method includes providing a test beam which... | 02/04/2003 |
| 6510167 | Method for actively modelocking an all-fiber laser An improved method and apparatus for mode-locking a fiber laser at a pre-selected frequency wherein a doped fiber segment contains a narrowband FBG and an electro-optically tuned FBG, thereby making obsolete the need for an EOM to modulate the laser's wav... | 01/21/2003 |
| 6507597 | Multiwavelength source Multiwavelength laser source transmitting a luminous flux including as many amplifier wave-guides as potential transmission wavelengths, a collimation optic system for collimating the beams transmitted by the wave-guides, a network and a retroreflector ma... | 01/14/2003 |
| 6501782 | Compact laser apparatus An apparatus for combining the outputs from multiple gain elements of an array within a single resonator cavity to achieve a predetermined spectral output or improved output power is provided. The resonator cavity is comprised of a reflector, preferably d... | 12/31/2002 |
| 6501783 | Distributed feedback surface plasmon laser A surface plasmon laser structure is formed to include a DFB structure as the metal carrying layer, thus forming a single mode surface plasmon laser. The DFB structure comprises a multiple layer metallic surface guiding structure (for example, titanium st... | 12/31/2002 |
| 6498799 | Single-mode fiber ring laser Fiber ring lasers that combine a fiber Fabry-Perot resonator and a fiber grating coupler to produce a single-mode laser output.... | 12/24/2002 |
| 6498666 | Integrated optical transceiver An integrated optical transceiver comprising: a laser cavity formed between first and second feedback elements (3,7), wavelength selective means, eg a diffraction grating (4), within the laser cavity for determining a lasing wavelength thereof and a light... | 12/24/2002 |
| 6496528 | Line narrowing unit with flexural grating mount A grating based line narrowing device for line narrowing lasers producing high energy laser beams. Techniques are provided for minimizing adverse effects of heat produced by the laser beam inside the line narrowing device. A flexural grating mount is prov... | 12/17/2002 |
| 6493374 | Smart laser with fast deformable grating A smart laser having automatic computer control of pulse energy, wavelength and bandwidth using feedback signals from a wavemeter. Pulse energy is controlled by controlling discharge voltage, wavelength by controlling the position of an RMAX mi... | 12/10/2002 |
| 6493366 | Vertical cavity surface emitting laser with oxidized strain-compensated superlattice of group III-V semiconductor A vertical cavity surface emitting laser that includes a Group III-V semiconductor material substrate; a first Distributed Bragg Reflector mirror, where the first Distributed Bragg Reflector mirror includes at least seven pairs of layers, where each layer... | 12/10/2002 |
| 6490306 | Molecular fluorine laser with spectral linewidth of less than 1 pm A narrow band molecular fluorine laser system includes an oscillator and an amplifier, wherein the oscillator produces a 157 nm beam having a linewidth less than 1 pm and the amplifier increases the power of the beam above a predetermined amount, such as ... | 12/03/2002 |
| 6487328 | Single wavelength semiconductor laser with grating-assisted dielectric waveguide coupler A grating (18) couples the waveguide region (36) of a semiconductor laser (11) to a dielectric waveguide (26). The waveguide region of the laser includes a mirror (15) at one end thereof and an absorber (19) at the other end thereof. The dielectric wavegu... | 11/26/2002 |
| 6483863 | Asymmetric waveguide electroabsorption-modulated laser A modulated laser device comprising two or more vertically stacked asymmetric waveguides is provided. The laser device comprises a first waveguide having a gain region formed therein for amplifying at least a first mode of light, and a second waveguide ve... | 11/19/2002 |
| 6480513 | Tunable external cavity laser A tunable laser system comprises an externalcavity laser diode in combination with an optically coupled waveguide having a Bragg grating formed therein. The laser diode provides a gain medium characterized by a first band of wavelengths. A portion of the ... | 11/12/2002 |
| 6477191 | Semiconductor laser device, semiconductor laser module, rare-earth-element-doped optical fiber amplifier and fiber laser A semiconductor laser device includes: an active layer; upper waveguide layers and a lower waveguide layer sandwiching the active layer therebetween; upper and lower cladding layers sandwiching the active layer and the upper and lower waveguide layers the... | 11/05/2002 |
| 6477187 | F2-laser with line selection An F2 -excimer laser has multiple closely-spaced spectral lines of interest around 157 nm, and one of the lines is selected by wavelength selection optics. The wavelength selection optics of a first preferred embodiment include a birefringent B... | 11/05/2002 |
| 6473443 | System and method for generating a grating image A method and a system for generating grating images with an improved speed is disclosed. The system utilizes a coherent light source for providing a coherent beam L, an exposure control device for controlling the exposure of the coherent beam L, a beam gu... | 10/29/2002 |
| 6470036 | Tunable external cavity semiconductor laser incorporating a tunable bragg grating A tunable external cavity semiconductor laser incorporating a tunable Bragg grating, including: a semiconductor gain medium; an elongated tuner housing having a tuner housing head and having a tuner housing foot, the tuner housing head and tuner housing f... | 10/22/2002 |
| 6463085 | Compact external cavity tunable lasers using hybrid integration with micromachined and electrooptic tunable elements An external cavity laser tuner. One embodiment constructed according to principles of the invention includes a cantilever interposed between the laser cavity mirrors or operating as a mirror. Another embodiment constructed according to principles of the i... | 10/08/2002 |
| 6459720 | Excimer laser An F2 -excimer laser has multiple closely-spaced spectral lines of interest around 157 nm, and one of the lines is selected by wavelength selection optics. The wavelength selection optics of a first preferred embodiment include a birefringent B... | 10/01/2002 |
| 6459716 | Integrated surface-emitting laser and modulator device An integrated surface emitting laser and modulator device is disclosed that includes a detector for monitoring the optical power output of the laser and another detector for monitoring an extinction ratio of the modulator. A cleave physically and electric... | 10/01/2002 |
| 6459533 | Tuneable optical filters An optical waveguide format tuneable optical filter is formed using Bragg grating reflectors to define one or more optical cavities of a Fabry Perot etalon, the or each cavity of the etalon including one or more slots containing a controllable refractive ... | 10/01/2002 |
| 6456758 | Chip for separating light into different wavelengths The invention provides a chip for separating light into different wavelengths. The chip includes a substrate, an input waveguide, an optical arrangement, and a plurality of output waveguides. The substrate has first and second edge sections. The input wav... | 09/24/2002 |
| 6456435 | Method and apparatus for adjusting spot size of one color component of a multiple color co-axial laser beam A method of adjusting a first spot size for a first color component (74) of a multiple color co-axial laser beam (70) that comprises, focusing the multiple color co-axial laser beam (70). Filtering the multiple color co-axial laser beam (70) with a filter... | 09/24/2002 |
| 6452720 | Light source apparatus, optical amplifier and optical communication system A light source apparatus suitable for use for evaluation of an optical device and for production of pump light for an optical amplifier. The apparatus includes a light emitting element having a gain band and a band reflection filter optically connected to... | 09/17/2002 |
| 6449301 | Method and apparatus for mode locking of external cavity semiconductor lasers with saturable Bragg reflectors External cavity semiconductor lasers using a saturable Bragg reflector as an external reflector are mode locked and produce output pulses of 1.9 ps from a semiconductor lasers without dispersion compensation. By coupling the output to a standard single mo... | 09/10/2002 |
