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| Number | Title | Issue Date |
| 6792027 | Integrated laser oscillator-amplifier system The present invention contemplates an integrated oscillator-amplifier system for deep UV generation. The system employs a long cavity oscillator to lengthen the pulse build-up time and to control the pulse spectral bandwidth. Meanwhile the system employs a short cav... | 09/14/2004 |
| 6788713 | Reduction of pulsations in DFB lasers Output power fluctuations in a distributed feedback laser arrangement are reduced by inducing a saturable absorption grating in a saturable absorption region. Light is coupled into a DFB region and amplified in an amplification region. A feedback loop reflects a por... | 09/07/2004 |
| 6788466 | Multiple reflectivity band reflector A multiple reflectivity band reflector (MRBR) includes a stack of dielectric layers, arranged so that the reflector has a reflectivity profile comprising a plurality of reflectivity bands, e.g. at least first and second wavelength bands with reflectivity above a las... | 09/07/2004 |
| 6785302 | Optical system in the ray path of a confocal fluorescence microscope The invention relates to an optical system in the ray path of a confocal fluorescence microscope, comprising at least one laser light source (1, 2), a device positioned in the illuminating/detecting beam (3, 4, 5) for separating the exciting light (... | 08/31/2004 |
| 6785319 | Ultraviolet laser device A narrow band ultraviolet laser device which can restrict a change in temperature gradient at light transmitting sections and maintain laser light at a high grade. To this end, the ultraviolet laser device includes light shielding elements (37A to 37C)... | 08/31/2004 |
| 6778579 | Solid-state laser compensated for pumping-light astigmatism In a solid-state laser in which a gain crystal is polished to have the Brewster angle or a solid-state laser comprising a dichroic concave mirror to which light enters at an incidence angle which is not zero, astigmatism generally occurs in pumping light. By tilting... | 08/17/2004 |
| 6778584 | High power gas discharge laser with helium purged line narrowing unit A helium purge for a grating based line narrowing device for minimizing thermal distortions in line narrowed lasers producing high energy laser beams at high repetition rates. Applicants have shown substantial improvement in performance with the uses of helium purge... | 08/17/2004 |
| 6768756 | MEMS membrane with integral mirror/lens An optical membrane device and method for making such a device are described. This membrane is notable in that it comprises an optically curved surface. In some embodiments, this curved optical surface is optically concave and coated, for example, with a highly refl... | 07/27/2004 |
| 6768764 | Laser beam reforming system A system for the reforming of a laser beam having a circular sector shaped beam cross section into a laser beam with a rectangular beam cross section, incorporates a mirror whose surface is shaped as the circular sector of a reflective parabolic rotational body. Wit... | 07/27/2004 |
| 6768757 | Cavity mirror for optically-pumped vertical-cavity surface-emitting laser (VCSEL) A laser comprising: a front mirror and a rear mirror which are disposed so as to establish a reflective cavity therebetween; a gain region disposed between the front mirror and the rear mirror, the gain region being constructed so that when the gain region is approp... | 07/27/2004 |
| 6765939 | Multiple reflectivity band reflector with non-uniform profile and laser system employing same for laser wavelength monitoring A monitored laser system has a laser having a first mirror; an exit mirror, at least a portion of a laser cavity defined by the first mirror and the exit mirror; and an active region located in the laser cavity, the active region containing a material that is capabl... | 07/20/2004 |
| 6763053 | Laser having multiple reflectivity band reflector A multiple reflectivity band reflector (MRBR) includes a stack of dielectric layers, arranged so that the reflector has a reflectivity profile comprising a plurality of reflectivity bands, e.g. at least first and second wavelength bands with reflectivity above a las... | 07/13/2004 |
| 6763050 | Method for optical pumping of thin laser media at high average power A thin, planar laser material is bonded to a light guide of an index-matched material forming a composite disk. Diode array or other pump light is introduced into the composite disk through the edges of the disk. Pump light trapped within the composite disk depletes... | 07/13/2004 |
| 6763046 | Method and system employing multiple reflectivity band reflector for laser wavelength monitoring A monitored laser system includes a laser with a first mirror and an exit mirror. The laser also has a laser cavity defined at least in part by the first mirror and the exit mirror. Within the laser cavity is an active region that contains material that is capable o... | 07/13/2004 |
| 6760359 | Grating-outcoupled surface-emitting lasers with flared gain regions A laser system comprises a laser diode with an active region and reflectors at both ends. An outcoupling aperture is located between the reflectors to couple light out of the device through the surface. The gain region increases in width as it nears the outcoupling ... | 07/06/2004 |
| 6757312 | Electron beam pumped semiconductor laser screen and associated fabrication method An electron beam pumped semiconductor laser screen and an associated fabrication method are described which provide a display screen that has a relatively long operating lifetime, is less expensive to produce, and operates at lower electron voltages and near room te... | 06/29/2004 |
| 6757307 | Self seeding pulsed non-linear resonant cavity This invention provides a means for generating multiple wavelengths in an integrated manner using a resonant cavity containing dispersion shifted non-linear medium and coupled to a pulsed laser source. The dispersion shifted non-linear medium is seeded by at least s... | 06/29/2004 |
| 6754249 | Laser resonator for generating polarized laser radiation A method for generating polarized laser output radiation utilizes a laser resonator whose active medium exhibits thermally induced birefringence. The radiation fields oscillating in the laser resonator are not subjected to polarization selection, and only the radiat... | 06/22/2004 |
| 6754248 | Solid-state laser and optical transmitter A solid-state laser having an excitation light source, a lens system for focusing an excitation light produced from the light source, and a laser resonator which is laser-oscillated in response to the focused excitation light. The resonator includes only a gain medi... | 06/22/2004 |
| 6754245 | GaN series surface-emitting laser diode having spacer for effective diffusion of holes between p-type electrode and active layer, and method for manufacturing the same A GaN series surface-emitting laser diode and a method for manufacturing the same are provided. The GaN series surface-emitting laser diode includes: an active layer; p-type and n-type material layers on the opposite sides of the active layer; a first-distributed Br... | 06/22/2004 |
| 6744805 | Single mode operation of microelectromechanically tunable, half-symmetric, vertical cavity surface emitting lasers A method is provided for fabricating microelectromechanically tunable vertical-cavity surface-emitting lasers with precise lateral and vertical dimensional control. Microelectromechanical tunable vertical cavity surface emitting laser structures are also provided wh... | 06/01/2004 |
| 6741619 | Semiconductor elements for stabilizing laser output Systems and methods for enhancing the stability of a mode-locked laser's output are disclosed. The laser systems include a mode-locking element that mode-locks the laser's output, and a semiconductor element. The semiconductor element produces a loss at the laser's ... | 05/25/2004 |
| 6741629 | Optical transmitter having optically pumped vertical external cavity surface emitting laser An optical fiber transmitter comprises an optically pumped single mode MQW VECSEL for emitting an information-carrying laser beam and has an external cavity length defining a comb of optical modes, each mode corresponding to a channel wavelength of an optical teleco... | 05/25/2004 |
| 6735236 | High power gas discharge laser with line narrowing unit A grating based line narrowing device for line narrowing lasers producing high energy laser beams. Techniques are provided for minimizing adverse effects of hot gas layers present on the face of the grating. In preferred embodiments a stream of gas is directe... | 05/11/2004 |
| 6735234 | Passively mode-locked optically pumped semiconductor external-cavity surface-emitting laser A passively mode-locked optically pumped semiconductor vertical-external-cavity surface-emitting laser (OPS-EXSEL) is disclosed. The laser is mode locked by a semiconductor saturable absorber mirror (SESAM) which forms part of an external cavity. Both the beam-quali... | 05/11/2004 |
| 6731666 | Laser device A laser device capable of efficiently oscillating laser light and always obtaining a stable beam form is provided. For this purpose, in the laser device including an amplifying section (18) in which a laser medium is amplified to oscillate laser light (11 | 05/04/2004 |
| 6728287 | Surface emitting semiconductor laser device capable of improving heat radiation efficiency and its manufacture method A lower multi-layer mirror is disposed on a substrate made of a first semiconductor having a first lattice constant. The lower multi-layer mirror has a lamination structure that a first layer made of an oxide of a second semiconductor and a second layer made of a th... | 04/27/2004 |
| 6724785 | Tunable fabry-perot filters and lasers with reduced frequency noise A tunable optical cavity constructed from a fixed mirror and a movable mirror. The fixed mirror is attached to a substrate having a first electrically conducting surface. A support member having the moveable mirror supported thereon and having a second electrically ... | 04/20/2004 |
| 6724796 | Modified distributed bragg reflector (DBR) for vertical cavity surface-emitting laser (VCSEL) resonant wavelength tuning sensitivity control An optical device has at least one reflector disposed in an optical cavity. The reflector has a plurality of mirror pairs each comprising a pair of layers, each layer of each mirror pair having an index of refraction different than that of the other layer of the res... | 04/20/2004 |
| 6714565 | Optically tunable Fabry Perot microelectromechanical resonator A tunable optical resonator whose resonance frequency is determined by a light signal introduced into the resonator. The resonator includes an optical cavity having a first mirror and a second mirror. The first mirror and second mirror are supported relative to one ... | 03/30/2004 |
| 6707518 | Electro-optic device allowing wavelength tuning Surface textures embossed in a substrate such as plastic include surface depressions or cones having equally-spaced, reflective terraced steps to support coherent reflections of incident light. A desired color or bandwidth of coherent reflected light off the terrace... | 03/16/2004 |
| 6700915 | Narrow band excimer laser with a resonator containing an optical element for making wavefront corrections A gas discharge laser system for generating a laser beam, such as an excimer or molecular fluorine laser system, includes a laser resonator with an optical element for making wavefront corrections such as an adaptable optical element, a phase conjugating ... | 03/02/2004 |
| 6693926 | MEMS-based selectable laser source A MEMS-based selectable laser output optical device (10) includes a laser source (12) having a laser output 14. A MEMS switch (16) is optically coupled to the laser source (12) for selectively coupling the laser output (14) from the laser source (12) in o... | 02/17/2004 |
| 6690709 | Device and method for reduction of spontaneous emission from external cavity lasers The present invention relates to a device for outcoupling of light in an external cavity laser, which external cavity laser comprises at least one light source, at least one wavelength selective feedback element, at least one polarization selective beam-s... | 02/10/2004 |
| 6690689 | Apparatus and method for compensating for age induced wavelength drift in tunable semiconductor lasers The present invention provides a method and apparatus for compensating for the age induced wavelength drift in a tunable DBR. In practice, the tuning characteristic (i.e. output wavelength versus tuning current) of a tunable DBR may be characterized befor... | 02/10/2004 |
| 6690688 | Variable wavelength semiconductor laser and optical module A wavelength-tunable semiconductor laser includes a semiconductor substrate; an optical waveguide on an upper surface of the semiconductor substrate; a front light reflection area including an SG-DBR mirror with repeating pairs of a diffraction grating po... | 02/10/2004 |
| 6690690 | Tunable laser system having an adjustable external cavity A wavelength tuning system adjusts an external cavity of a laser about two orthogonal axes for aligning features of a diffractive optic with a third orthogonal axis about which the diffractive optic is pivoted for providing selected wavelength feedback to... | 02/10/2004 |
| 6687281 | Double intracavity contacted long-wavelength VCSELs A vertical cavity surface emitting laser (VCSEL) includes a semiconductor device having a pair of mirror portions, an active region, a tunnel junction, a pair of cladding layers and a substrate. Heat generated by the VCSEL dissipates through the cladding ... | 02/03/2004 |
| 6687275 | Resonating cavity system for broadly tunable multi-wavelength semiconductor lasers A resonating cavity system of a tunable multi-wavelength semiconductor laser. The system has a laser, a collimating lens, a grating, a slit plate, and adjustable mirrors. The laser has two ends. The first end is coupled to the cavity, and the second end o... | 02/03/2004 |
| 6683895 | Wavelength agile external cavity diode laser An external cavity diode laser and method of generating laser light comprising: generating light from a Fabry-Perot diode laser source; collimating light from the source with an intracavity optical element; reflecting light via a feedback mirror; and empl... | 01/27/2004 |
