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| Number | Title | Issue Date |
| 7907643 | Laser system A laser system (10) is disclosed comprising a laser device (1) for emitting laser radiation and an optical fibre (2) adapted to connect, in use, to the laser device (1) for delivering the laser radiation. The optical fibre contains a labe... | 03/15/2011 |
| 7899092 | Fast quantum gates with ultrafast chirped pulses Apparatus and methods of performing fast single-qubit quantum gates using ultrafast femtosecond frequency chirped laser pulses are disclosed. The use of chirped pulses removes the demanding restrictions of prior art approaches and allows for the construction of fast... | 03/01/2011 |
| 7468995 | Optical switch An optical switch, wherein the first and second output ports (optical fibers) are disposed on the opposite sides of the input port (optical fiber) so as to form acute angles with respect to the input port, the input port and the first output port are optically coupl... | 12/23/2008 |
| 7382807 | Systems and methods for automatic power control of laser diodes Methods and system are provided for automatic power control of a laser diode, e.g., in a laser driver. In accordance with an embodiment of the present invention, a power controller includes a detector circuit adapted to detect the output of the laser diode and to pr... | 06/03/2008 |
| 7361978 | Laser diode packaging A laser diode package includes a heat sink, a laser diode, and an electrically nonconductive (i.e. insulative) substrate. The laser diode has an emitting surface and a reflective surface opposing the emitting surface. The laser diode further has first and second sid... | 04/22/2008 |
| 7300808 | Optically pumped, surface-emitting semiconductor laser device and method for the manufacture thereof The invention is directed to an optically pumped surface-emitting semiconductor laser device having at least one radiation-generating quantum well structure and at least one pump radiation source for optically pumping the quantum well structure, whereby the pump rad... | 11/27/2007 |
| 7289591 | Counter circuit for controlling off-chip driver Disclosed herein is a counter circuit for controlling an off-chip driver, wherein hexadecimal number counting is performed using a N (N is a natural number) number of T-flip-flops. The plurality of the T-flip-flops performs a hexadecimal number counting operation to... | 10/30/2007 |
| 7277464 | Method and apparatus for controlling the output of a gas discharge laser system The present invention relates to a fluorine gas discharge laser system and control of replenishment of fluorine gas as the gas discharge laser operates and consumes fluorine. ... | 10/02/2007 |
| 7260655 | Optical routing using star switching fabric with reduced effective switching time In one embodiment, a router includes a star switching fabric operable to receive a plurality of optical signals each having a wavelength and each associated with a payload received by the router and to communicate from the switching fabric a plurality of substantial... | 08/21/2007 |
| 7215688 | Disable/enable control for laser driver eye safety A circuit for disabling an energy-generating component. The circuit comprises an input operable to receive a disable signal and a disable circuit operable to disable the component in response to the disable signal for a predetermined duration of time sufficient to m... | 05/08/2007 |
| 7133427 | Phase conjugate laser and method with improved fidelity A spatial filter adapted to increase the angular spread of non-conjugated energy in a beam and suppress this energy to improve the efficiency of a phase conjugate system. In the illustrative embodiment, the filter includes first and second lenses and an aberrator to... | 11/07/2006 |
| 7092641 | Method and apparatus for optical transmission of wavelength-encoded modulation formats A system that transmits amplitude modulated data in a wavelength-encoded format and then uses a wavelength-sensitive receiver to convert the received optical signal back to the original amplitude modulated data. This system enables transmission of optical signals th... | 08/15/2006 |
| 7081990 | Variable-gain gain-clamped optical amplifiers An optical amplifier is disclosed comprising a signal semiconductor optical amplifier having a waveguide, forming at least part of a signal path between an input and an output, extending along a signal active region for amplification of a signal. The amplifier also ... | 07/25/2006 |
| 7075338 | Light emitting element driving circuit with current mirror circuit A light emitting element driving circuit for supplying driving current I2 to a light emitting element 10 connected to one line 2 of a current mirror circuit 12 is equipped with a pulse generating circuit 20 connected to the other line ... | 07/11/2006 |
| 7060515 | Method of manufacturing a laser diode package A laser diode package includes a heat sink, a laser diode, and an electrically nonconductive (i.e. insulative) substrate. The laser diode has an emitting surface and a reflective surface opposing the emitting surface. The laser diode further has first and second sid... | 06/13/2006 |
| 7046434 | Optical crossbar using lasing semiconductor optical amplifiers An optical crossbar switch is described that minimizes the number of electrical components and optimizes the conversion between optical and electrical signals. Utilizing various characteristics of lasing semiconductor optical amplifiers, the optical crossbar switch ... | 05/16/2006 |
| 7010187 | Mode transition-discrimination photonic logic device The present invention is a photonic logic circuit for multimode optical signals. The device includes a laser cavity having at least four conduits, the combination forming a substantially X-shaped construction. An output is attached to each conduit for transmission o... | 03/07/2006 |
| 6983005 | Holographic laser and optical pickup It is an object of the invention to provide a holographic laser and an optical pickup, with which it is possible to read from and write to a plurality of types of optical disks with different read wavelengths, and to achieve a more compact apparatus. The holographic... | 01/03/2006 |
| 6980747 | Optically amplified receiver An integrated, optically amplified receiver includes an optically pumped optical preamplifier for receiving, generally, wavelength division multiplexed optical communication signal over an optical communications line. A PIN photodetector receives the optical communi... | 12/27/2005 |
| 6954479 | Optically pumped, surface-emitting semiconductor laser device and method for the manufacture thereof The invention is directed to an optically pumped surface-emitting semiconductor laser device having at least one radiation-generating quantum well structure and at least one pump radiation source for optically pumping the quantum well structure, whereby the pump rad... | 10/11/2005 |
| 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 |
| 6937379 | Molecular architecture for molecular electro-optical transistor and switch Observable changes in electrical and optical characteristics of individual molecules adsorbed on a conductor or semi-conductor caused by electrical and/or optical excitation or de-excitation of electrons within such molecules can be used as signals which in turn can... | 08/30/2005 |
| 6931039 | Optical transmitter equipment and semiconductor laser device Optical transmitter equipment and a semiconductor laser device are provided. In one example, optical transmitter equipment includes a semiconductor laser driven by a direct-modulated method. The optical transmitter equipment comprises at least a semiconductor laser,... | 08/16/2005 |
| 6835992 | Closely-spaced VCSEL and photodetector for applications requiring their independent operation A monolthically integrated VCSEL and photodetector, and a method of manufacturing same, are disclosed for applications where the VCSEL and photodetector require separate operation such as duplex serial data communications applications. A first embodiment integrates ... | 12/28/2004 |
| 6792024 | Laser arrangement The invention in question relates to a laser arrangement (1). The device includes the means (2, 4) to steer the laser beam across a reflecting body (3). The body (3) is arranged to reflect the said laser beam so that it is aimed in a surr... | 09/14/2004 |
| 6697408 | Q-switched cavity dumped CO2 laser for material processing This disclosure discusses techniques for obtaining wavelength selected simultaneously super pulsed Q-switched and cavity dumped laser pulses utilizing high optical damage threshold electro-optic modulators, maintaining a zero DC voltage bias on the CdTe e... | 02/24/2004 |
| 6608846 | Bistable laser device with multiple coupled active vertical-cavity resonators A new class of bistable coupled-resonator vertical-cavity semiconductor laser devices has been developed. These bistable laser devices can be switched, either electrically or optically, between lasing and non-lasing states. A switching signal with a power... | 08/19/2003 |
| 6567441 | Source follower circuit, laser driving apparatus, semiconductor laser apparatus, current-voltage convertion circuit, and light receiving circuit Provided are a source follower circuit having a current source having its improved current characteristics, laser driving apparatus, semiconductor laser apparatus, current-voltage conversion circuit, and light receiving circuit. Each of the laser driving ... | 05/20/2003 |
| 6477192 | Device for on-line control of output power of vacuum-UV laser A beam delivery system for a laser emitting at a relevant wavelength of less than 200 nm is provided. The system includes a sealed enclosure connected to the laser and surrounding the path of the beam as it exits the laser resonator. The enclosure extends... | 11/05/2002 |
| 6434173 | Open loop wavelength control system for a tunable laser The present invention provides an optical multimeter for use in calibrating and testing optical components. The optical multimeter includes an optical analog/digital signal generator for delivering an output beam over a wide range of frequencies, duty cyc... | 08/13/2002 |
| 6414974 | Method and a control circuit for controlling the extinction ratio of a laser diode A control circuit (10) controls the operation of a laser diode (1) for controlling the average power output (Pav) and the extinction ratio. A state machine (21) controls the control circuit (10) which reads the current from a monitor photo diod... | 07/02/2002 |
| 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 |
| 6324190 | Device with at least one beam source and an arrangement for geometric reshaping of the radiation field emitted by the beam source An arrangement is disclosed for geometrically shaping a radiation field, in particular the radiation field of a diode laser array which propagates in the z direction and has a radiation cross section which is larger, in a direction defined as the y direct... | 11/27/2001 |
| 6259714 | Power source control apparatus for laser diode A power source control apparatus has a constant current circuit and plural laser diodes. A first switching circuit is turned off, while a second switching element is turned on, before a laser beam is output from the laser diodes. Then, there is formed a c... | 07/10/2001 |
| 6256329 | Semiconductor laser driver circuit The larger the number of successive "0"s preceding a "1" in input data applied to a semiconductor laser, the longer the emission delay time of the laser. Accordingly, if a pulse signal for driving the semiconductor laser is made to rise earlier by an amou... | 07/03/2001 |
| 6215804 | Producing laser light of different wavelengths In a tunable laser device a plurality of basically identical lasers are arranged adjacent to each other in a line or row on a common substrate. The lasers can be DFB-type and they have different emission wavelengths, obtained from e.g. different pitches o... | 04/10/2001 |
| 6154477 | On-board laser-triggered multi-layer semiconductor power switch A laser activated semiconductor switching device has a semiconductor structure housed in a semiconductor structure housing, and a laser array assembly directly connected to the semiconductor structure housing. The laser array assembly houses a plurality o... | 11/28/2000 |
| 5987040 | Optical and gate An optical AND gate includes at least one semiconductor laser amplifier (SLA) and inputs for first and second optical signals. The gate produces an output corresponding to the AND product of A and B. In one aspect of the invention, the first and second si... | 11/16/1999 |
| 5821571 | Dual sided integrated electro-optical package An integrated electro-optical package including a dual sided opto-electronic device, composed of a substrate with an array of light emitting devices (LEDs) formed on a first major surface thereof, and at least one vertical cavity surface emitting laser fo... | 10/13/1998 |
| 5748653 | Vertical cavity surface emitting lasers with optical gain control (V-logic) The Vertical-cavity-surface-emitting Lasers with Optical Gain Control (V-LOGIC) form a family of integrated optical smart pixels for interconnect and signal processing applications. V-LOGIC devices consist of Vertical Cavity Surface Emitting Lasers (VCSEL... | 05/05/1998 |
