Quotables
"What, sir, would you make a ship sail against the wind and currents by lighting a bonfire under her deck? I pray you, excuse me, I have not the time to listen to such nonsense."
Napoleon Bonaparte ; When told of the Robert Fulton steamboat
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 6542525 | Light modulator and integrated semiconductor laser-light modulator A modulator and an integrated semiconductor modulator-laser device, in which the capacitance of the modulator is reduced to increase the cut-off frequency, and a manufacturing process for the device. A wire layer connecting a modulator electrode to a pad ... | 04/01/2003 |
| 6539038 | Reference frequency quadrature phase-based control of drive level and DC bias of laser modulator A single reference tone/frequency-based control scheme adjusts the DC bias voltage and modulation signal drive level to an external X-cut lithium niobate Mach Zehnder modulator, in accordance with phase quadrature components of the output of the single to... | 03/25/2003 |
| 6535321 | Thin film ferroelectric light modulators A solid state device used to modulate the intensity of reflected or transmitted light by modulating with an external voltage the optical thickness of a thin film ferroelectric placed in an etalon cavity is disclosed. The device is constructed by selecting... | 03/18/2003 |
| 6522471 | System of beam narrowing for resolution enhancement and method therefor A system of beam narrowing for resolution enhancement produces a narrowed beam for use in surface imaging. The system of beam narrowing for resolution enhancement uses a Fabry-Perot cavity to sharpen the intensity profile of a light source imaged through ... | 02/18/2003 |
| 6516017 | Multiwavelength semiconductor laser device with single modulator and drive method therefor A semiconductor laser device and corresponding drive method use a single modulator to attain, across a wide wavelength range of, for example, 12 nm or greater, the same wavelength difference Ɗλ between the oscillation wavelength of a distributed Feedbac... | 02/04/2003 |
| 6516014 | Programmable frequency reference for laser frequency stabilization, and arbitrary optical clock generator, using persistent spectral hole burning Techniques for stabilizing a laser (110) at a selectable frequency include splitting an output beam from an electrically adjustable laser into a first beam (369) and a second beam (361). The second beam is transmitted through a modulator (112). Then the s... | 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 |
| 6490302 | Semiconductor laser control circuit and laser light source A semiconductor laser control circuit of the invention can modulate a light power level among a plurality of set levels including a first level, a second level lower than the first level, and a third level lower than the first level but higher than the se... | 12/03/2002 |
| 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 |
| 6483573 | Projection exposure system and an exposure method in microlithography A projection exposure system having a light source generating a pulsed light, in particular a laser 1 generating linearly polarized light, is provided with an illuminating beam path, with an illuminating device 2 and a lens system 3 as objective. A rotati... | 11/19/2002 |
| 6476916 | Active optical detector Disclosed is a modidied acrylic coating composition cured with melamine characterized by improved inpact resistance which comprises: An acrylic polyol dissolved in a suitable solvent to 40-90% solids; 2 to 50% by weight of said acrylic polyol subatituted ... | 11/05/2002 |
| 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 |
| 6452953 | Light source A light source in which a signal light having a wavelength outside a normal tolerance is not supplied to the outside of the light source. A temperature control circuit controls an optical switch so that the signal light outputted from a laser diode (LD) m... | 09/17/2002 |
| 6418152 | Multi-amplifier, high power mode locked laser A mode locked semiconductor laser that can generate relatively high-power output pulses. The semiconductor mode locked laser is formed from an array of optical amplifiers that are coupled to a common resonant cavity by way of an optical channelizer or wav... | 07/09/2002 |
| 6411422 | Thin film ferroelectric light modulators A solid state device used to modulate the intensity of reflected or transmitted light by modulating with an external voltage the optical thickness of a thin film ferroelectric placed in an etalon cavity is disclosed. The device is constructed by selecting... | 06/25/2002 |
| 6408014 | Apparatus and method for stabilizing the frequency of a light source A monolithically integrated light source and frequency discriminator has a section in which a single frequency optical signal is produced and a section in which the frequency is sensed. The output of the optical discriminator is connected to a controller ... | 06/18/2002 |
| 6404784 | High average power solid-state laser system with phase front control A scalable high power laser system includes a plurality of parallel connected modular power amplifier arms, coupled to a common master oscillator to provide a high average power laser system with a scalable output power level, particularly suitable for la... | 06/11/2002 |
| 6393034 | Laser apparatus and laser processing apparatus An intracavity wavelength conversion laser apparatus has a stable resonator in which a solid-state laser active medium, a resonator Q-value modulating element, and a wavelength conversion crystal, a nonlinear element, are arranged along a laser optical ax... | 05/21/2002 |
| 6385219 | Laser diode pumped solid state laser A laser diode pumped solid state laser includes a solid laser medium, and an index optical waveguide type laser diode which emits a pumping light beam for pumping the laser medium. A high-frequency which is higher than a response frequency of the solid la... | 05/07/2002 |
| 6385215 | Laser oscillation method and device and laser scalpel A laser oscillation device, which has an optical fiber where laser ion is doped; an excitation emission element that generates one laser beam including multiple wavelength components by exciting the laser ion in the optical fiber by light emission; a tota... | 05/07/2002 |
| 6381259 | Controlling laser polarization A laser polarization control apparatus includes a polarization modifying device and a controller. The polarization modifying device receives a laser beam and modifies the polarization of the laser beam. The controller adjusts an input to the polarization ... | 04/30/2002 |
| 6373563 | Polarization randomized optical source having short coherence length An optical source generates optical signals as a result of varying polarization states to achieve oscillation within an optical loop. The optical signals have narrow spectral width and the optical source is tuneable, so that optical components stimulated ... | 04/16/2002 |
| 6370175 | Laser beam luminous energy correction method, laser driving apparatus, laser beam scanner and image recording device The object of the present invention is to precisely correct the luminous energy of a laser beam on a scanned surface which varies according to scanning and varies according to an angle of incidence with the scanned surface when a laser beam emitted from a... | 04/09/2002 |
| 6370164 | Broadband sagnac raman amplifiers and cascade lasers This invention describes new developments in Sagnac Raman amplifiers and cascade lasers to improve their performance. The Raman amplifier bandwidth is broadened by using a broadband pump or by combining a cladding-pumped fiber laser with the Sagnac Raman ... | 04/09/2002 |
| 6363091 | Coherent population trapping-based method for generating a frequency standard having a reduced magnitude of total a.c. stark shift A quantum absorber is provided having transitions that include a first transition between a first lower quantum state and an upper quantum state, and a second transition between a second lower quantum state and the upper quantum state. The first transitio... | 03/26/2002 |
| 6359913 | Stabilization of injection locking of CW lasers An injection locking system for lasers. In particular, a signal from a master laser is phase modulated and injected into a slave laser. The phase difference $c; is maintained at zero by way of a phase locked loop. By maintaining the phase difference &#... | 03/19/2002 |
| 6359916 | Coherent population trapping-based frequency standard and method for generating a frequency standard incorporating a quantum absorber that generates the CPT state with high frequency The frequency standard comprises a quantum absorber, source of incident electr-omagnetic radiation, detector, controller and signal output. The quantum absorber has a transition between a lower quantum state split by hyperfine interaction into two lower s... | 03/19/2002 |
| 6349106 | Method for converting an optical wavelength using a monolithic wavelength converter assembly A method of converting an optical wavelength includes providing a wavelength converter assembly with a photodetector and a laser that have a common epitaxial structure with areas of differing bandgap. The laser including a laser resonator. An optical inpu... | 02/19/2002 |
| 6347108 | Method and apparatus for modulated integrated optically pumped vertical cavity surface emitting lasers Modulated integrated optically pumped vertical cavity surface emitting lasers are formed by integrating an electrically pumped semiconductor laser and a vertical cavity surface emitting laser (VCSEL) together with a means of direct modulation of the elect... | 02/12/2002 |
| 6344913 | Optical clock division A clock signal at a divided clock rate is obtained from an optical signal stream at a higher clock rate. The optical signal stream at the higher clock rate is applied to an all-optical non- linear gate. There is feedback from the first output of the gate ... | 02/05/2002 |
| 6341136 | Optical beam deflector modifying phases of respective portions of optical beam by two arrays of optical phase modulators An optical beam deflector in which a crosssection of an incident optical (e.g., laser) beam is divided into a first plurality of portions (micro crosssections) by an array of first lenses, a plurality of phases of the optical beam in the first micro cross... | 01/22/2002 |
| 6339604 | Pulse control in laser systems A pulsed laser system includes a laser pump, a laser rod, a reflector interposed between the laser pump and the laser rod, through which energy from the laser pump enters the laser rod, an output reflector through which energy is emitted from the laser ro... | 01/15/2002 |
| 6333942 | Atomic frequency standard laser pulse oscillator An ultra-stable microwave output with less jitter than a prior art atomic oscillator is obtained and an ultra-short optical pulse train is generated with a repetition frequency stabilized at the same level as a time standard. The repetition frequency of a... | 12/25/2001 |
| 6333808 | Optical signal scrambling An optical signal scrambler (18) has an optical phase modulator (22) which has a common input/output for an optical signal. The modulator also has an input for a modulating signal and a common output/input which is coupled to a 45° Faraday mirror (24). T... | 12/25/2001 |
| 6331990 | Demodulating and amplifying systems of lasers with optical gain control (DAS-LOGiC) The present invention demodulates a FM, WM or AM optical input beam, amplifies the signal impressed on the beam, and then modulates without intervening electronics the signal amplitude of an output beam. The apparatus can be made from any semiconductor la... | 12/18/2001 |
| 6331991 | Transmission system using a semiconductor laser and a fiber grating discriminator The optical signal produced by a modulated semiconductor laser is passed through a fiber grating optical discriminator to increase the modulation response of the device and decrease the output chirp for transmission through optical fiber. In one embodimen... | 12/18/2001 |
| 6331910 | Arrangement and method for electrically controlling the intensity of unpolarized light In an arrangement and a method for electrically controlling the intensity of non-polarized light, a polarizing beam splitter is acted upon by the light to be controlled via an input face such that the light is split into two polarized light bundles that a... | 12/18/2001 |
| 6330266 | Method for selecting a semiconductor integrated optical modulator/laser light source device The present invention provides a method for selecting a semiconductor integrated optical modulator/laser light source device comprising a modulator section and a laser section. The method comprises the following steps. The laser section is supplied with a... | 12/11/2001 |
| 6324193 | Continuously wavelength-tunable monomode laser source The invention relates to an external cavity, continuously tunable monomode laser source, comprising, in a resonant cavity, resonating at the emission wavelength λe, a retroreflecting wavelength dispersing device, arranged to produce a selectivity curve w... | 11/27/2001 |
| 6320688 | Optical transmitter An optical transmitter includes a directly modulated semiconductor laser and a non-linear optical intensity modulator which is connected in series with the output of the laser. High frequency analogue modulating signals are applied both to the laser and t... | 11/20/2001 |
