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| Number | Title | Issue Date |
| 8116343 | Method of driving a laser diode An ultrashort pulse/ultra-high power laser diode with a simple structure and configuration. The laser diode can be driven by a pulse current which is 10 or more times higher than a threshold current value. The width of the pulse current is preferably 10 nanoseconds ... | 02/14/2012 |
| 8111723 | Method of driving a laser diode An ultrashort pulse/ultra-high power laser diode with a simple structure and configuration is provided. In a method of driving a laser diode, the laser diode is driven by a pulse current which is 10 or more times higher than a threshold current value. The width of t... | 02/07/2012 |
| 8068523 | Laser gain medium and laser oscillator using the same A laser gain medium includes an optical medium configured to transmit a laser beam and having an incident face, a first face, a second face opposing to the first face; and gain media configured to amplify the laser beam while reflecting the laser beam. At least one ... | 11/29/2011 |
| 7940820 | Method of protecting a laser against damage caused by undesired incident light in a resonator A method of protecting a laser against damage caused by undesired incident light in a resonator includes measuring a parameter, which is a measure for the optical power of the incident light. In more concrete terms, the optical power occurring at a resonator mirror ... | 05/10/2011 |
| 7903703 | Control device, control circuit, control method, and recording medium with a control program recorded therein The present invention provides a control device capable of performing feedback control so that a signal-wavelength input to a control target object becomes a specific signal-wavelength, using an input signal whose duty value is other than 50%. Accordingly, the contr... | 03/08/2011 |
| 7835410 | Opto-isolator including a vertical cavity surface emitting laser The present invention relates to opto-isolators. Opto-isolators are disclosed that include a transmitter package and a vertical VCSEL disposed within the transmitter package. The opto-isolators further include a receiver package and a photodetector disposed within t... | 11/16/2010 |
| 7688872 | Self-Calibrating integrated photonic circuit and method of control thereof A self-calibrating integrated photonic circuit and a method of controlling the same. In one embodiment, the circuit includes: (1) a substrate, (2) a laser located on the substrate and configured to produce source light at an output frequency, (3) a laser alignment s... | 03/30/2010 |
| 7672345 | Semiconductor laser drive control apparatus A drive signal for driving a semiconductor laser is generated on the basis of an image signal inputted in synchronism with a pixel clock. A bias signal to the semiconductor laser is generated at a timing earlier than the drive signal by a predetermined time. The bia... | 03/02/2010 |
| 7599411 | WDM-PON system with optical wavelength alignment function A PLC-based wavelength-tunable WDM-PON system with an optical wavelength alignment function, the WDM-PON system comprises: a PLC platform formed on a silicon substrate; a semiconductor chip comprising an active region generating light and a passive region located in... | 10/06/2009 |
| 7570678 | Wavelength determining apparatus, wavelength determining method, semiconductor laser controlling apparatus, and semiconductor laser controlling method A wavelength determining apparatus is disclosed. The wavelength determining apparatus includes a reflection block, a light detection block, and a determination block. The reflection block receives at least part of a laser light beam emitted from an external cavity t... | 08/04/2009 |
| 7466729 | Wavelength monitor for use with more than one wavelength A wavelength locker for use at more than one wavelength includes filters with different characteristics for a corresponding detector. The filters may be etalons having different free spectral ranges, e.g., having different apparent or real thicknesses. If more than ... | 12/16/2008 |
| 7433375 | Laser trim and compensation methodology for passively aligning optical transmitter A method embodiment of the invention includes a scheme for trimming and compensation of a laser emitter in a fiber optic link. A laser emitter is provided. Also a reference optical power value is determined using data models of laser emitter performance generated by... | 10/07/2008 |
| 7426224 | Optical transmitter with a digitally controlled bias and modulation currents for a laser diode The present invention is to provide an optical transmitter that installs a laser diode and a circuit to control currents supplied to the laser diode, and reduces the size of the control circuit. The transmitter includes an LD, an LD-Driver, a monitor PD, and a contr... | 09/16/2008 |
| 7420146 | Laser beam monitor and control method A device and method for monitoring a light beam (e.g., laser beam) without intruding upon the light beam is disclosed. The device comprises a focusing lens which receives scattered light from a reflective or transmitting optical element and directs the scattered lig... | 09/02/2008 |
| 7418015 | System and method for control of optical transmitter A system and method for controlling an optical transmitter. Proximate to startup of the optical transmitter, the laser bias to the optical transmitter is increased from a minimum to a setpoint according to a predefined function. After the laser bias setpoint is reac... | 08/26/2008 |
| 7400662 | Calibration of laser systems A method for determining a condition of the laser system includes determining a change in a laser current from an initial value. A method for measuring a laser current includes determining a difference between the values of a power supply current, which is the value... | 07/15/2008 |
| 7388891 | Wide bandwidth light source PROBLEM TO BE SOLVED: to realize a wide bandwidth light source capable of a stable operation providing a less spectrum variation. SOLUTION: Optical pulses 202 outputted by this optical pulse-generating device 201 are split by optical coupler ... | 06/17/2008 |
| 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 |
| 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 |
| 7376354 | All optical clock recovery All optical clock recovery includes a transmitter for generating an optical timing signal. The transmitter includes a semiconductor laser for the production of a dynamically synchronizable timing signal, the laser having an external resonator for feedback of the tim... | 05/20/2008 |
| 7359412 | Laser apparatus, laser irradiation method, and manufacturing method of semiconductor device It is an object to provide a laser apparatus, a laser irradiating method and a manufacturing method of a semiconductor device that make laser energy more stable. To attain the object, a part of laser beam emitted from an oscillator is sampled to generate an electric... | 04/15/2008 |
| 7355618 | Image exposure apparatus An image exposure apparatus of a different angle incident type is provided having a single optical sensor unit for determining the timing for start point synchronization along the main scanning direction, an output level detecting device determining the output level... | 04/08/2008 |
| 7352782 | Surface emitting semiconductor laser and communication system using the same A surface emitting semiconductor laser includes a laminate of semiconductor layers emitting multimode laser light, and a block member blocking light of a specific mode among the multimode laser light emitted from the laminate. ... | 04/01/2008 |
| 7339973 | Electrodes for fluorine gas discharge lasers Fluorine gas discharge laser electrodes and electrode systems that may comprise a plurality of current return tangs extending for less than the respective length of the second elongated gas discharge electrode. In addition electrodes may comprise a first discharge s... | 03/04/2008 |
| 7339963 | High speed data channel including a CMOS VCSEL driver and a high performance photodetector and CMOS photoreceiver A high speed optical channel including an optical driver and a photodetector in a CMOS photoreceiver. The optical channel driver includes a FET driver circuit driving a passive element (e.g., an integrated loop inductor) and a vertical cavity surface emitting laser ... | 03/04/2008 |
| 7321606 | Laser trim and compensation methodology for passively aligning optical transmitter A method includes a scheme for trimming and compensation for a laser emitter in a fiber optic link. Data models of laser performance are provided and used to determine a base power level. It is then confirmed that the base power level is satisfactory. If necessary, ... | 01/22/2008 |
| 7321607 | External optics and chamber support system A gas discharge laser and method of operating same is disclosed which may comprise a gas discharge laser chamber support structure comprising a first support arm attached to a mounting table; a gas discharge laser chamber slideably engaging the first support arm; an... | 01/22/2008 |
| 7317179 | Systems and methods to shape laser light as a homogeneous line beam for interaction with a film deposited on a substrate Systems and methods are disclosed for shaping and homogenizing a laser beam for interaction with a film. The shaping and homogenizing system may include a lens array and a lens that is positioned to receive laser light from the lens array and produce a respective el... | 01/08/2008 |
| 7317741 | Amplified spontaneous emission ducts Amplified spontaneous emission (ASE) ducts are disclosed for use with various gain media. An ASE duct may be configured and arranged to remove ASE from solid state or liquid gain media and transmit the ASE to an exterior optical medium. The refractive index of an AS... | 01/08/2008 |
| 7301980 | Halogen gas discharge laser electrodes A gas discharge laser includes a laser chamber containing a halogen laser gas, two electrode elements defining a cathode and an anode, each having a discharge receiving region defining two longitudinal edges and having a region width defining a width of an electric ... | 11/27/2007 |
| 7298766 | Laser diode driver and driving method for controlling auto laser power, optical pickup device, and optical recording/reproducing apparatus using the same A laser diode driver, and driving method, for driving a laser diode in an optical recording/reproducing apparatus, having an auto laser power control (APC) operation, an optical pickup device, and an optical recording/reproducing apparatus, and method therefore, usi... | 11/20/2007 |
| 7282706 | Advanced optics for rapidly patterned laser profiles in analytical spectrometry The present invention is directed to a novel arrangement of optical devices for the rapid patterning of laser profiles used for desorption and/or ionization sources in analytical mass spectrometry. Specifically, the new optical arrangement provides for a user-define... | 10/16/2007 |
| 7277188 | Systems and methods for implementing an interaction between a laser shaped as a line beam and a film deposited on a substrate Systems and methods are disclosed for focusing a beam for an interaction with a film deposited on a substrate wherein the focused beam defines a short axis and a long axis. In one aspect, the system may include a detecting system to analyze light reflected from the ... | 10/02/2007 |
| 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 |
| 7266308 | Light output control circuit Using a switching signal from a coarse/fine switching and operation mode switching circuit, the width of change of a counter control value during power up is increased, and the width of change is reduced once a steady state is reached. In the steady state, the frequ... | 09/04/2007 |
| 7266136 | Temperature compensation for fiber optic transceivers using optimized convergence algorithms A temperature compensation system comprises a laser driver having a first potentiometer, the laser driver configured to provide a first signal to a laser based on a value of the first potentiometer and an optical communication analyzer configured to provide a second... | 09/04/2007 |
| 7242701 | Laser wavelength control arrangement and method Wavelength control and stabilization of a laser is achieved by a practical, inexpensive, and accurate technique adapted for most optical transmission system applications by a method involving a laser characterization phase and a laser wavelength control and stabiliz... | 07/10/2007 |
| 7230965 | Anodes for fluorine gas discharge lasers Electrodes for a fluorine gas discharge laser are disclosed which may comprise a crown straddling the centerline axis between the pair of side walls and the pair of end walls, comprising a first material, forming at least a portion of the discharge region of the ele... | 06/12/2007 |
| 7227881 | Master oscillator—power amplifier excimer laser system A Master Oscillator (MO)—Power Amplifier (PA) configuration (MOPA) can be used advantageously in an excimer laser system for micro-lithography applications, where semiconductor manufacturers demand powers of 40 W or more in order to support the throughput requirem... | 06/05/2007 |
| 7221429 | Wavelength locker with liquid crystal tunable filter generating transmitted and reflected outputs A wavelength locker operates with a reference tunable liquid crystal filter having integrated photodetectors deposited on the front and backside of the liquid crystal cell to track power intensity of the accepted passband signal and its rejected signal compliment at... | 05/22/2007 |
