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| Number | Title | Issue Date |
| 8050301 | Systems and methods for stabilizing laser frequency based on an isoclinic point in the absorption spectrum of a gas Systems and methods for stabilizing laser frequency based on an isoclinic point of an atomic or molecular medium are provided herein. A system may include: a transmission cell containing a gas and configured to transmit light from the laser, the gas having an absorp... | 11/01/2011 |
| 8023540 | Pair of optically locked semiconductor narrow linewidth external cavity lasers with frequency offset tuning An optical phase lock loop (OPLL) system is disclosed that includes a master external cavity laser (ECL), and a substantially identical slave ECL. The master and slave ECLs are fabricated using a planar semiconductor device with waveguide-integrated planar Bragg gra... | 09/20/2011 |
| 8000359 | Laser device and controlling method therefor A laser device capable of preventing deterioration of a light signal and a controlling method therefor are provided. A wavelength tunable laser module provided with a resonator including the wavelength tunable filter and a semiconductor light amplifier having a phas... | 08/16/2011 |
| 7822084 | Method and apparatus for stabilizing and tuning the bandwidth of laser light According to aspects of an embodiment of the disclosed subject matter, method and apparatus are disclose that may comprise adjusting a differential timing between gas discharges in the seed laser and amplifier laser for bandwidth control, based on the error signal, ... | 10/26/2010 |
| 7813390 | Injection-seeded monolithic laser An injection seeding laser system in which the seeded laser has a monolithic structure without any moving parts. The seeder emits light whose wavelength is swept in a radio frequency (RF) over a range that covers one or more longitudinal mode(s) of the seeded laser,... | 10/12/2010 |
| 7773644 | Frequency-stabilized laser device, laser frequency stabilizing method, and laser frequency stabilizing program A frequency-stabilized laser device comprises an actuator arranged to vary the cavity length; an actuator driver arranged to apply a voltage to the actuator for changing displacement; a temperature detector arranged to detect the temperature on the cavity; a tempera... | 08/10/2010 |
| 7711019 | Variable wavelength light source A gain element and a variable wavelength reflector form a resonator. A wavelength selective element selects a resonance wavelength in the resonator. A beam splitter is provided for monitoring an incident light from the gain element and a reflected light from the var... | 05/04/2010 |
| 7613216 | Laser frequency stabilizing apparatus, method and computer program product for stabilizing laser frequency A laser frequency stabilizing apparatus stabilizes an oscillation frequency of laser light by varying a resonator length on the basis of a saturated absorption line included in an optical output signal. The optical output signal is obtained by irradiating an absorpt... | 11/03/2009 |
| 7599413 | Self-contained module for injecting signal into slave laser without any modifications or adaptations to it A self-contained module injects seeds into a slave laser for applications such as single mode or multimode injection seeding, master oscillator power amplifiers, regenerative amplifiers, optical parametric oscillators, Raman lasers, and LIDAR systems. The injection ... | 10/06/2009 |
| 7505494 | System and method for controlling wavelength of a laser beam A system of controlling a wavelength of a laser beam is provided. The system comprises a stage for supporting a wafer, an optical convergence unit for emitting the laser beam moving in an optical path toward the stage, and a specific wavelength detecting sensor. The... | 03/17/2009 |
| 7502395 | Pulsed coherent fiber array and method A pulsed coherent fiber array laser system that includes a beam generating sub-system that provides a signal pulse beam having pulses of the desired duration that is split into several fiber channels. Optical leakage between the pulses in each split beam is measured... | 03/10/2009 |
| 7460573 | Optical frequency stabilizer and method for stabilizing optical frequency An etalon functioning as a Fabry-Perot resonator is formed by bonding a quartz crystal bulk having a pair of Z-cut surfaces and a compensation bulk having a pair of Z-cut surfaces with one of the Z-cut surfaces of the quartz crystal bulk facing one of the Z-cut surf... | 12/02/2008 |
| 7436864 | Method for optimising the calibration process of a tuneable laser A method relating to the calibration of tuneable lasers is described. The method provides for the provision of correct control currents so as to achieve each of desired output frequencies from the laser. The correct currents are determined by forming a matrix of the... | 10/14/2008 |
| 7430227 | Wavelength tunable laser source with parameter correction A wavelength tunable laser unit has a laser mode selection, and is adapted to provide a laser signal in accordance with one or more laser control parameters. For operating the laser unit, the laser signal is swept in a wavelength range, a laser operation signal indi... | 09/30/2008 |
| 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 two-divided detectors has two detectors arranged in the direction of which ... | 09/16/2008 |
| 7418210 | Programmable transition time adjustment mechanism An optical transceiver in which one or more bias currents provided to the laser driver are adjusted at cold temperatures such that transition speeds are reduced. A preliminary current generation circuit generates a preliminary current. In addition, a programmable co... | 08/26/2008 |
| 7418025 | Wavelength monitoring method and apparatus and method of making same A wavelength of an optical source is monitored by first and second adjacent detectors on a common base. A bulk reflective component has first and second partially reflective surfaces that respectively direct first and second portions of energy from the source to the... | 08/26/2008 |
| 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 plurality of closely spaced modes relative to optical frequencies. The ... | 08/26/2008 |
| 7400660 | Terahertz wave generation system To make a terahertz wave generation system capable of easily illuminating terahertz wave on an arbitrary position and to easily realize the system for practical use by effectively using existing systems and devices, the terahertz wave generation system has: a two-wa... | 07/15/2008 |
| 7400659 | Method and device for performing DBR laser wavelength modulation free of thermal effect The present invention is directed to a method and system for providing a three-level current scheme to a semiconductor laser to control beam wavelength and laser temperature. A first current is received into a gain section of the semiconductor laser and at least one... | 07/15/2008 |
| 7398023 | Method and apparatus for bias and alignment control in an optical signal transmitter A method and apparatus for controlling bias and alignment in an optical signal transmitter for providing intensity modulation and DPSK modulation to an optical signal, e.g. in an RZ-DPSK modulation format. Output power in dither signals applied to the bias signals m... | 07/08/2008 |
| 7389053 | Tunable filtering of RF or microwave signals based on optical filtering in Mach-Zehnder configuration Devices and techniques for achieving signal filtering in RF or microwave frequencies by optical filtering using two separate optical paths. Each optical path may include one or more optical resonators to achieve desired optical filtering. ... | 06/17/2008 |
| 7388894 | Hybrid MOPA having narrowband oscillator and amplifier with integrated optical coupling A waveguide to waveguide coupled hybrid master oscillator power amplifier (MOPA) includes a wavelength locked laser master oscillator (MO) first chip including a semiconductor substrate, a waveguide region having a gain section, one side of the MO including an integ... | 06/17/2008 |
| 7379672 | Photonic RF distribution system The present photonic RF generation and distribution system provides a system and method for distributing an RF output signal. The photonic RF distribution system includes two optical sources for generating optical signals. A first optical source (42) is opera... | 05/27/2008 |
| 7372056 | LPP EUV plasma source material target delivery system An EUV light generation system and method is disclosed that may comprise a droplet generator producing plasma source material target droplets traveling toward the vicinity of a plasma source material target irradiation site; a drive laser; a drive laser focusing opt... | 05/13/2008 |
| 7369722 | Coupled and non-coupled opto-electronic oscillators with enhanced performance This application describes coupled and non-coupled opto-electronic oscillators with enhanced performance. Coupled OEOs implement a dispersion compensation mechanism to reduce dispersion-induced optical loss, a polarization control mechanism to reduce polarization-de... | 05/06/2008 |
| 7369597 | Laser output light pulse stretcher Providing a high peak power short pulse duration gas discharge laser output pulse comprises a pulse stretcher a laser output pulse optical delay initiating optic diverting a portion of the output laser pulse into an optical delay having an optical delay path and com... | 05/06/2008 |
| 7369774 | Optical frequency controlling device for ultra-dense wavelength-division-multiplexed optical channels Disclosed is an optical frequency controlling device for ultra-dense wavelength-division-multiplexed optical channels in which center frequencies of optical channels are aligned. An optical frequency controlling device for ultra-dense wavelength-division-multiplexed... | 05/06/2008 |
| 7366422 | Dispersion compensating device and optical transmission system A dispersion compensating device having a VIPA plate which is an optical component, a lens, and a mirror includes high reflectivity side monitor means for monitoring the light that is input into the VIPA plate and emitted from the first reflecting surface. By this, ... | 04/29/2008 |
| 7365351 | Systems for protecting internal components of a EUV light source from plasma-generated debris Systems and methods are disclosed for protecting an EUV light source plasma production chamber optical element surface from debris generated by plasma formation. In one aspect of an embodiment of the present invention, a shield is disclosed which comprises at least ... | 04/29/2008 |
| 7366214 | Diode-pumped solid-state laser with self-maintained multi-dimensional optimization A diode-pumped solid-state laser (DPSSL) has self-maintained multi-dimensional optimization. The output property of the DPSSL, including optical power, noise level, and the operation conditions of its individual components, including the drive current and temperatur... | 04/29/2008 |
| 7365349 | EUV light source collector lifetime improvements An apparatus and method for cleaning a plasma source material compound from a plasma produced EUV light source collector optic which may comprise reacting the plasma source material compound with hydrogen to form a hydride of the plasma source material from the plas... | 04/29/2008 |
| 7362818 | Amplitude and phase comparator for microwave power amplifier A predistortion power amplifier architecture has a power amplifier which receives an input via an amplitude modulator and a phase modulator. A sample of the output of the amplifier and a sample of the input to the amplifier are applied to an adaptive pre-distorter s... | 04/22/2008 |
| 7362925 | Control method and control apparatus of optical device The present invention aims at providing a control method and a control apparatus for controlling the operation setting of an optical device with high accuracy, so as to reliably obtain characteristics according to a desired relationship to be set corresponding to a ... | 04/22/2008 |
| 7359648 | Wavelength tuning optimization of semiconductor lasers A method of characterizing a tunable semiconductor laser diode by varying the laser tuning currents of a section, and measuring the output power transmitted by the laser through a wavelength discriminating device (WDD), in such a way that determines the currents nee... | 04/15/2008 |
| 7359432 | Speed negotiation for serial transceivers An arrangement to enable automatic baud rate speed negotiation between transceivers having different operating speed characteristics is implemented. When an event indicative of a possible baud rate mismatch occurs, control signals are generated and used to trigger a... | 04/15/2008 |
| 7356055 | Method and device for regulating the average wavelength of a laser, especially a semiconductor laser The invention relates to a method for regulating the average wavelength of a laser, especially a semiconductor laser, comprising a wavelength-selective, at least partially reflecting optical element (27) and being operated in a unimodal manner. The inventive ... | 04/08/2008 |
| 7355191 | Systems and methods for cleaning a chamber window of an EUV light source Systems and methods are disclosed for cleaning a chamber window of an extreme ultraviolet (EUV) light source. The window may have an inside surface facing a chamber interior and an opposed outside surface and the light source may generate debris by plasma formation.... | 04/08/2008 |
| 7356056 | Coherent light source and control method thereof, and display unit and laser display using them In a display device that displays a video by scanning coherent light across a screen, modulation at high speeds and gradation are necessary for a coherent light source. An oscillation wavelength of a semiconductor laser outputting the fundamental wave is chan... | 04/08/2008 |
| 7352791 | Optical systems including wavefront correcting optical surfaces The present invention relates to optical systems, beam expanding assemblies, line narrowing modules, and lasers having refractive optical elements with wavefront correcting optical surfaces. The present invention enables the skilled artisan to provide optical system... | 04/01/2008 |
