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| Number | Title | Issue Date |
| 7092419 | Wavelength agile laser An electric field that changes across space is synthesized, by applying voltage levels independent of one another at several locations. The independence in voltage levels allows the electric field that is synthesized to be made periodic or aperiodic. Such a synthesi... | 08/15/2006 |
| 7088747 | Variable wavelength light source When a piezoelectric element 3 applies an external force to a plastic photonic crystal, the photonic crystal deforms, and accordingly, the photonic band gap easily changes. When the photonic band gap changes, transmission of light with a specific wavelength i... | 08/08/2006 |
| 7085302 | Laser apparatus, exposure apparatus and method There is to provide a laser apparatus that emits a laser beam by exciting gas enclosed in a chamber, including a gas characteristic detecting mechanism for detecting a characteristic of the gas in the chamber, and a calculation mechanism for calculating an oscillati... | 08/01/2006 |
| 7023893 | Low-pressure axial direction excitation type Flaser oscillator An axial direction excitation type F2 laser apparatus comprises a discharge tube consisting of an insulating cylinder and metal electrodes at both ends of thereof, and a reflecting mirror or a transmitting mirror, constituting a resonator, outside the ele... | 04/04/2006 |
| 7016384 | Second-harmonic generation device using semiconductor laser element having quantum-well active layer in which resonator length and mirror loss are arranged to increase width of gain peak A second-harmonic generation device includes a semiconductor laser element which has a quantum-well active layer, a wavelength control means which controls the wavelength of the light emitted from an end facet of the semiconductor laser element, an optical system wh... | 03/21/2006 |
| 7010012 | Method and apparatus for reducing specular reflections in semiconductor lasers The present invention is directed a method of fabricating a VCSEL. First, a substrate with a back surface and a front surface is provided. Then, a first reflector, an active region, and a second reflector are disposed on the front surface. The first reflector is dis... | 03/07/2006 |
| 7006537 | Single polarization fiber laser A method and apparatus for generating single polarization fiber laser output are disclosed. A Bragg grating is non-destructively fabricated within the fiber to introduce differential loss between the two polarizations of the laser output. Curvature at the grating si... | 02/28/2006 |
| 7006538 | Apparatus for locking bending mechanism that bends reflex type wavelength selection element A an apparatus for locking a bending mechanism that bends a reflex type wavelength selection element for a bending mechanism that bends a reflex type wavelength selection element comprises a locking assembly. The locking assembly locks the bending mechanism. This al... | 02/28/2006 |
| 7003010 | Multi-group multi-wavelength laser matrix A laser system capable of producing multiple groups of output wavelengths is disclosed. In one embodiment, an optical fiber bundle doped with erbium (Er) or erbium/ytterbium (Er/Yb) is perpendicularly attached to an optical device, which serves as a guided-mode reso... | 02/21/2006 |
| 6999485 | Semiconductor optical device A kink-free semiconductor optical device stabilizing laser oscillation and producing a high optical performance. The semiconductor optical device includes a beam waveguide extending in a longitudinal direction between a pair of end surfaces. The beam waveguide inclu... | 02/14/2006 |
| 6999487 | Terahertz generation processes and imaging process thereof A process including: magnetically energizing susceptible magnetic particles; and accumulating the resulting terahertz lasing mode output of the particles. ... | 02/14/2006 |
| 6996145 | Semiconductor laser module, and method for driving the semiconductor laser module The invention provides a semiconductor laser module which can suppress overcurrent flowing into a thermo-module, wherein the thermo-module (5) carries out a heating action when a reverse current flows from lead pin (16f) through lead pin (16 | 02/07/2006 |
| 6996142 | Light source device and wavelength control device therefor Disclosed herein is a light source device and a wavelength control device therefor. The light source device includes a plurality of laser diodes, a temperature sensor provided in the vicinity of the plurality of laser diodes, a control loop for controlling the tempe... | 02/07/2006 |
| 6993057 | Coarse spectrometer with a grating A quasi-monochromatic light beam carrier for a particular telecommunication channel is likely to experience drift because of age, temperature, or other factors, and may cause the centroid wavelength of the carrier to shift. Temperature adjustments by wavelength lock... | 01/31/2006 |
| 6990128 | Surface emitting semiconductor laser and manufacturing method thereof There is provided a surface emitting semiconductor laser satisfying a requirement of making a transverse mode stable and having characteristics of high output power, low resistance, high efficiency, and high speed response and a method for manufacturing the surface ... | 01/24/2006 |
| 6990129 | Characterization of multiple section semiconductor lasers A method for characterizing tunable semiconductor laser diodes in which the laser is stimulated in a way that discloses the optical properties and tuning current dependency of the individual sections of the laser, separately for each section, and independently of th... | 01/24/2006 |
| 6990136 | Laser beam transmission apparatus A laser beam transmission apparatus comprises a light-incidence optical system (22) converging and focusing a laser beam emitted from a solid-state laser apparatus (1), and an optical fiber (8) which transmits the laser beam that has been conver... | 01/24/2006 |
| 6990127 | Vertical laser diode with means for beam profile forming A vertical laser diode includes a vertical resonator and a device for shaping the beam profile of the laser diode. The shaping device has at least one decoloring absorber. The configuration provide a vertical laser diode structure that permits stable beam profile sh... | 01/24/2006 |
| 6987786 | Controlling laser polarization A laser polarization control apparatus includes a polarization modifying device, such as a liquid crystal variable retarder, and a controller. The polarization modifying device receives a laser beam and modifies the polarization of the laser beam. The controller, wh... | 01/17/2006 |
| 6982998 | Linear cavity tunable laser A laser source includes a laser medium having a back facet and a front surface, whereby the laser medium is adapted to emit a laser beam through the front surface into an external cavity defined in length by a cavity end mirror reflecting the laser beam back towards... | 01/03/2006 |
| 6980575 | Topology on VCSEL driver The present invention provides a circuit capable of driving a diode with multiple amounts of current with a low supply voltage without the requirement of alternating current coupling. The circuit provides for headroom voltage for the current sources allowing them to... | 12/27/2005 |
| 6970487 | Semiconductor laser driving circuit and optical head A semiconductor laser driving circuit comprises a driving IC and a substrate on which the IC is mounted. The IC incorporates: a switching element for generating a driving signal; a high-potential power terminal and a low-potential power terminal for feeding supply v... | 11/29/2005 |
| 6970492 | DUV and VUV laser with on-line pulse energy monitor A beam parameter monitoring unit for coupling with an excimer or molecular fluorine (F2) laser resonator that produces an output beam having a wavelength below 200 nm includes an on-line laser pulse energy detector. This, in turn, allows output pulse ener... | 11/29/2005 |
| 6967980 | Optical semiconductor module A semiconductor laser diode, in which an active layer is formed close to a bottom surface thereof, is fixed to a top surface of a substrate by means of solder layers in such a condition that the bottom surface of the semiconductor laser diode faces the top surface o... | 11/22/2005 |
| 6967986 | Light modulation apparatus using a VCSEL array with an electromechanical grating device An apparatus for providing modulated light, that includes: a VCSEL array for generating an illumination beam from a plurality of emissive elements within the VCSEL array; a linear array of electromechanical grating devices for modulating the illumination beam to pro... | 11/22/2005 |
| 6967977 | Optical pulse train generator A laser source provides a pulse that is subdivided and replicated into subpulses by a delay structure having a plurality of steps. Each of the subpulses is delayed by one of the plurality of steps and the amount that each subpulse is delayed is different than the ot... | 11/22/2005 |
| 6965624 | Laser gas replenishment method A method and apparatus is provided for stabilizing output beam parameters of a gas discharge laser by maintaining a molecular fluorine component of the laser gas mixture at a predetermined partial pressure using a gas supply unit and a processor. The molecular fluor... | 11/15/2005 |
| 6965625 | Apparatuses and methods for generating coherent electromagnetic laser radiation The present disclosure is directed to laser apparatuses for generating coherent electromagnetic laser radiation having an electron beam generator, a diffraction grating element oriented such that a beam of electrons from the electron beam generator is directed over ... | 11/15/2005 |
| 6963594 | Organic laser cavity device having incoherent light as a pumping source An organic laser cavity device, that includes: a first dielectric stack for receiving and transmitting pumped beam light and being reflective to laser light over a predetermined range of wavelengths and having a substantially low threshold for optical excitation; an... | 11/08/2005 |
| 6961361 | Laser irradiation apparatus An object is to obtain an even energy distribution of a laser beam in one direction, thereby conducting a uniform laser annealing on a film. A laser irradiation apparatus comprising: a lens for dividing a laser beam in one direction; and an optical system for... | 11/01/2005 |
| 6961356 | Integrated wavelength combiner/locker An integrated wavelength combiner/locker is described herein that performs a multiplexing function of a wavelength combiner and a wavelength error measurement function of a wavelength locker. In the preferred embodiment, the integrated wavelength combiner/locker inc... | 11/01/2005 |
| 6956881 | Stacked semiconductor laser diode The present invention relates to an arrangement of semiconductor diode lasers stacked on top of one another, which is arranged on a substrate (1). A first diode laser (12) is arranged on the substrate (1), and a second diode laser (13) is... | 10/18/2005 |
| 6956878 | Method and apparatus for reducing laser speckle using polarization averaging A method and apparatus for reducing speckle uses polarization averaging. A polarizing beam splitter divides a first polarized laser output into a second polarized laser output and a third polarized laser output. A plurality of mirrors creates an optical path differe... | 10/18/2005 |
| 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 dominant mode, such that when operating at extremes of temperature, the p... | 10/18/2005 |
| 6952435 | Speckle free laser probe beam The present invention contemplates a method and apparatus to generate a laser probe beam free of speckles. The present invention employs a holographic phase plate inserted in a laser beam path to modulate the relative phase across the beam. The holographic phase pla... | 10/04/2005 |
| 6952437 | Laser with wide operating temperature range An optical device including a laser with a laser cavity having a gain curve with a maximum at a wavelength λmax; and an optical carrier coupled to the cavity. The optical carrier includes a grating that defines a reflection peak coefficient at a waveleng... | 10/04/2005 |
| 6950453 | Pulser driven, helium free transversely excited atmospheric-pressure (TEA) CO2 laser A novel and inexpensive excitation circuit based on a single switch and a single source drives helium-free TEA CO2 lasers, mini to conventional types, providing low divergent output. By varying the partial pressure of either CO2 or N2 | 09/27/2005 |
| 6950451 | Multi-beam semiconductor laser element A multi-beam semiconductor laser device capable of emitting respective laser beams with uniform optical output levels and enabling easy alignment is provided. This multi-beam semiconductor laser device (40) is a GaN base multi-beam semiconductor laser device ... | 09/27/2005 |
| 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 optical fiber configured to guide the multiple mode laser beam to an... | 09/27/2005 |
| 6947456 | Open-loop laser driver having an integrated digital controller A laser driver for generating drive waveforms that are suitable for driving a single VCSEL or an array of VCSELs. A digital controller is integrated into the laser driver and is utilized to initially program and selectively adjust during the operation of the driver ... | 09/20/2005 |
