Particular Component Circuitry Patents (Class 372/38.1)
  • Patent number: 10644473
    Abstract: Driver laser systems for EUV radiation producing apparatuses are disclosed that include a beam source for producing laser radiation propagating in a first direction, an amplifier arrangement comprising at least one optical amplifier for amplifying the laser radiation propagating in the first direction, and at least one optical isolator. The optical isolator includes a chamber filled with a gas, through which chamber the laser radiation propagating in the first direction passes, and a plasma generating device configured for the pulsed ignition of a plasma in the gas of the chamber to suppress passage of laser radiation propagating in a second direction, opposite to the first direction, through the chamber. EUV radiation producing apparatuses that include such driver laser systems are also disclosed.
    Type: Grant
    Filed: August 9, 2018
    Date of Patent: May 5, 2020
    Assignee: TRUMPF Lasersystems for Semiconductor Manufacturing GmbH
    Inventors: Jens Brunne, Matthias Wissert, Guenther Krauss
  • Patent number: 10637206
    Abstract: The invention relates to an assembly comprising an electric component. The component has an electric part, a control circuit, and a capacitor. At least two lead frames are provided which are embedded into a housing. The part, the control circuit, and the capacitor are arranged on the lead frames, and the control circuit is designed to charge the capacitor and to supply the part with current from the capacitor in a clocked manner. The component has two contacts, and the component is arranged on a support. The support has an electrically conductive layer and the two contacts are connected to the layer in an electrically conductive manner. At least one first part of one lead frame is arranged at a greater distance from the electrically conductive layer than the second lead frame.
    Type: Grant
    Filed: May 16, 2017
    Date of Patent: April 28, 2020
    Assignee: OSRAM OLED GMBH
    Inventors: Hubert Halbritter, Andreas Wojcik
  • Patent number: 10530128
    Abstract: Methods, devices and systems are described for enabling a series-connected, single chip vertical-cavity surface-emitting laser (VCSEL) array. In one aspect, the single chip includes one or more non-conductive regions one the conductive layer to produce a plurality of electrically separate conductive regions. Each electrically separate region may have a plurality of VCSEL elements, including an anode region and a cathode region connected in series. The chip is connected to a sub-mount with a metallization pattern, which connects each electrically separate region on the conductive layer in series. In one aspect, the metallization pattern connects the anode region of a first electrically separate region to the cathode region of a second electrically separate region. The metallization pattern may also comprise cuts that maintain electrical separation between the anode and cathode regions on each conductive layer region, and that align with the etched regions.
    Type: Grant
    Filed: July 25, 2018
    Date of Patent: January 7, 2020
    Assignee: TRILUMINA CORP.
    Inventors: Richard F. Carson, Nein-Yi Li, Mial E. Warren
  • Patent number: 10529479
    Abstract: Inductor cooling systems and methods are disclosed. A vehicle inductor cooling system may include an inductor assembly, a flange extending around a periphery of the inductor assembly, and a sealing wall having an outer periphery and a sealing surface forming a seal with the flange. A bottom surface may extend from the outer periphery and a cavity may be defined by the outer periphery, the bottom surface, and the inductor assembly. A coolant inlet may be configured to provide coolant to the cavity. The inductor assembly may include at least one conductive coil wrapped around a core. A bottom portion, optionally only the bottom portion, of the coil may be disposed within the cavity and configured to be directly contacted and cooled by the coolant (e.g., ATF).
    Type: Grant
    Filed: November 4, 2016
    Date of Patent: January 7, 2020
    Assignee: Ford Global Technologies, LLC
    Inventors: Vincent Skalski, Serdar Hakki Yonak
  • Patent number: 10477677
    Abstract: An optical modulator with FPC and optical transmission device using the same are provided. This optical modulator includes a flexible printed circuit which electrically connects the optical modulator to a circuit board. The flexible printed circuit has a substantially quadrilateral shape. A pad is formed on the flexible printed circuit along one side of the substantially quadrilateral shape so as to be electrically connected to the circuit board. In order to release the mechanical stress applied onto the side or the end portion of the flexible printed circuit and/or to prevent propagation of distortion generated in the side or the end portion, the flexible printed circuit has: a cutout or a notch provided in a direction from a part of at least one side toward the inside of the flexible printed circuit; and/or a curved portion connecting at least two adjacent sides.
    Type: Grant
    Filed: September 15, 2016
    Date of Patent: November 12, 2019
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Norikazu Miyazaki, Ryo Shimizu, Toru Sugamata
  • Patent number: 10340654
    Abstract: A laser apparatus includes a light source configured to output excitation light, an optical resonator in which laser medium is excited by the excitation light, the optical resonator being configured to output laser beam, a temperature regulator configured to adjust temperature of the light source to a standard temperature, an optical detector configured to detect output power of the laser beam, and a controller configured to change the standard temperature based on the detected output power of the laser beam.
    Type: Grant
    Filed: August 2, 2018
    Date of Patent: July 2, 2019
    Assignee: Gigaphoton Inc.
    Inventors: Seiji Nogiwa, Yasufumi Kawasuji
  • Patent number: 10135223
    Abstract: An optical module includes: a wiring substrate that has a wiring pattern including a connecting portion and is arranged on an optical subassembly so as to be electrically connected thereto; and a flexible insulating layer formed between the optical subassembly and the wiring substrate. The optical subassembly includes: a conductive stem that has a surface opposed to the wiring substrate, the conductive stem being shaped so that the surface has a through hole opened therein and being connected to a reference potential; and a signal lead for transmitting a signal, the signal lead passing through the through hole while being electrically insulated from the conductive stem. The signal lead passes through the flexible insulating layer to be joined to the connecting portion. The flexible insulating layer is in contact with the connecting portion, the signal lead, and the surface of the conductive stem.
    Type: Grant
    Filed: May 24, 2017
    Date of Patent: November 20, 2018
    Assignee: Oclaro Japan, Inc.
    Inventors: Daisuke Noguchi, Kazuhiro Komatsu
  • Patent number: 9923337
    Abstract: A quantum cascade laser includes a laser structure including laser waveguide structures and a first terrace region; first electrodes; pad electrodes; and wiring metal conductors. The laser structure includes first, second and third regions arranged in a direction of a first axis. The third region is disposed between the first and second regions. The first region has a first end facet disposed at a boundary between the first and third regions. The first end facet extends in a direction intersecting with the first axis. The second region has a second end facet disposed at a boundary between the second and third regions. The second region includes the laser structure. The pad electrodes are disposed on the first terrace region. The first electrodes are disposed on the laser waveguide structures. Each of the pad electrodes is connected to one of the first electrodes through one of the wiring metal conductors.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: March 20, 2018
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Hiroyuki Yoshinaga, Tsukuru Katsuyama, Jun-ichi Hashimoto
  • Patent number: 9913376
    Abstract: An exemplary bridging inter-connector establishes electrical connections between conductors on a PCB and aligned conductors on a first board mounted to the PCB. A flexible non-conductive sheet covers at least a portion of these conductors. Separated conductive strips on the sheet that are dimensioned to align with and engage at least a portion of both the aligned conductors. A thin film of a bonding agent is disposed on the separated conductive strips and located to engage at least a portion of both aligned conductors to form a conductive connection.
    Type: Grant
    Filed: May 4, 2016
    Date of Patent: March 6, 2018
    Assignee: Northrop Grumman Systems Corporation
    Inventors: Anthony L. Long, Alexander Parra, II
  • Patent number: 9905991
    Abstract: An intra-cavity doubled OPS-laser has a laser-resonator including a birefringent filter (BRF) for coarse wavelength-selection, and an optically nonlinear (ONL) crystal arranged for type-II frequency-doubling and fine wavelength-selection. Laser-radiation circulates in the laser-resonator at one of a range of fundamental wavelengths dependent on the resonator length. The ONL crystal has a transmission peak-wavelength dependent on the crystal temperature. Reflection of circulating radiation from the BRF is monitored. The reflection is at a minimum when the ONL crystal transmission-peak wavelength is at the circulating radiation wavelength. The temperature of the ONL crystal is selectively varied to maintain the monitored reflection at about a minimum.
    Type: Grant
    Filed: August 18, 2014
    Date of Patent: February 27, 2018
    Assignee: Coherent LaserSystems GmbH & Co. KG
    Inventor: Christian Kannengiesser
  • Patent number: 9692203
    Abstract: An optical module includes: a wiring substrate that has a wiring pattern including a connecting portion and is arranged on an optical subassembly so as to be electrically connected thereto; and a flexible insulating layer formed between the optical subassembly and the wiring substrate. The optical subassembly includes: a conductive stem that has a surface opposed to the wiring substrate, the conductive stem being shaped so that the surface has a through hole opened therein and being connected to a reference potential; and a signal lead for transmitting a signal, the signal lead passing through the through hole while being electrically insulated from the conductive stem. The signal lead passes through the flexible insulating layer to be joined to the connecting portion. The flexible insulating layer is in contact with the connecting portion, the signal lead, and the surface of the conductive stem.
    Type: Grant
    Filed: June 2, 2016
    Date of Patent: June 27, 2017
    Assignee: OCLARO JAPAN, INC.
    Inventors: Daisuke Noguchi, Kazuhiro Komatsu
  • Patent number: 9620930
    Abstract: Systems, and apparatus for adding reflection based pre-emphasis to a laser driver. In one aspect, a device includes a load (e.g. a laser) having a load impedance, a first end of a transmission line connected to the load, and a reflective impedance element connected to a second end of the transmission line. The reflective impedance element has a given impedance value that differs from the transmission line's characteristic impedance, and the characteristic impedance differs from the load impedance. This mismatch causes reflections between the reflective impedance element and the load. The reflections between the reflective impedance element and the load combine with an incident signal at the load to create a target signal having a target spectral shape.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: April 11, 2017
    Assignee: ADTRAN, INC.
    Inventor: Jared Cress
  • Patent number: 9485021
    Abstract: Systems, devices, and methods for hybrid anti-clipping in optical links in hybrid fiber-coaxial (HFC) networks are disclosed. A hybrid anti-clipping circuit can be included in both the uplink and downlink paths of the HFC network to avoid driving the laser in the optical link above a clipping threshold. The anti-clipping circuit can compare the average, or RMS, input power level and the power envelope of a RF input signal to a clipping threshold associated with the particular laser module being used. If the average power is above the clipping threshold, then the input signal can be attenuated proportionally to avoid clipping. If peaks in the power envelope are above the clipping threshold, then the bias current of the laser module can be adjusted to avoid clipping. Accordingly, the modes of anti-clipping circuit operation include applying attenuation to the input signal and/or adjusting the laser module bias current.
    Type: Grant
    Filed: July 25, 2014
    Date of Patent: November 1, 2016
    Assignee: ARRIS Enterprises, Inc.
    Inventors: Joaquin Beas Bujanos, Sergio Alfredo Mendoza Aguirre
  • Patent number: 9225928
    Abstract: Disclosed herein is a laser driving circuit, including: a plurality of laser driving video current generation circuits configured to generate a plurality of kinds of laser driving current for driving a plurality of laser light sources configured to emit laser light having wavelengths different from each other based on an inputted video signal; a high frequency superposition section configured to superpose a high frequency signal having a frequency higher than a frequency band of the video signal on the laser driving current generated by the laser driving video current generation circuits; and a waveform correction section configured to correct a waveform of the high frequency signal.
    Type: Grant
    Filed: March 5, 2013
    Date of Patent: December 29, 2015
    Assignee: Sony Corporation
    Inventors: Tsutomu Kurihara, Motoi Kimura
  • Patent number: 9190804
    Abstract: A pulse light source includes: a master laser that outputs a master laser light pulse whose repetition frequency is controlled to a predetermined value; a slave laser that outputs a slave laser light pulse; a phase comparator that detects a phase difference between an electric signal having a frequency of the predetermined value, and an electric signal based on a light intensity of the slave laser light pulse; a loop filter; an adder that adds a repetition frequency control signal having a certain repetition cycle, to an output from the loop filter; and a phase comparator that measures a pulse phase difference which is a phase difference between the master laser light pulse and the slave laser light pulse. A magnitude of the repetition frequency control signal is controlled such that the measured pulse phase difference matches with a target value of the pulse phase difference.
    Type: Grant
    Filed: July 19, 2013
    Date of Patent: November 17, 2015
    Assignee: ADVANTEST CORPORATION
    Inventors: Tomoyu Yamashita, Akiyoshi Irisawa
  • Patent number: 9185330
    Abstract: Disclosed herein is a laser driving circuit, including: a plurality of laser driving video current generation circuits configured to generate a plurality of kinds of laser driving current for driving a plurality of laser light sources configured to emit laser light having wavelengths different from each other based on an inputted video signal; a high frequency superposition section configured to superpose a high frequency signal having a frequency higher than a frequency band of the video signal on the laser driving current generated by the laser driving video current generation circuits; and a waveform correction section configured to correct a waveform of the high frequency signal.
    Type: Grant
    Filed: March 5, 2013
    Date of Patent: November 10, 2015
    Assignee: Sony Corporation
    Inventors: Tsutomu Kurihara, Motoi Kimura
  • Patent number: 9054484
    Abstract: A wiring is located on a multilayer ceramic substrate. A ceramic block is located on the multilayer ceramic substrate. Electronic parts, including a semiconductor laser, are located on a surface of the ceramic block. A wiring located on the surface of the ceramic block connects some of the electronic parts to the wiring. A metallic cap with a glass window is located on the multilayer ceramic substrate. This metallic cap covers the ceramic block and the electronic parts, including the semiconductor laser.
    Type: Grant
    Filed: April 4, 2012
    Date of Patent: June 9, 2015
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Akihiro Matsusue
  • Patent number: 9031108
    Abstract: A temperature-compensated laser driving circuit for driving a laser component is provided. The temperature-compensated laser driving circuit includes: a temperature compensation circuit, configured to generate a second current based on a first current and a temperature-independent current; and a modulation current generating circuit, configured to generate a modulation current based on the second current, and calibrate optical power output of the laser component based on the modulation current. The first current is proportional to the absolute temperature. The second current and the first current have a slope relative to the absolute temperature respectively, and the slope of the second current relative to the absolute temperature is larger than of the slope of the first current relative to the absolute temperature.
    Type: Grant
    Filed: July 23, 2014
    Date of Patent: May 12, 2015
    Assignee: VIA TECHNOLOGIES, INC.
    Inventors: Cheng-Ming Ying, Wei-Yu Wang, Yi-Jan Wang, Yen-Yu Chen
  • Patent number: 9031104
    Abstract: The laser mount arrangement can have a laser bar and a driver positioned adjacent to one another and secured against a connection face of a heat sink base. The heat sink base is connected to and forms a first electrical connection between the laser bar and the driver. A second electrical connection is also provided between the laser bar and the driver opposite the heat sink base, which can be in the form of a flexible metal sheet with a narrow upward fold. This arrangement can provide a low inductance path for the current.
    Type: Grant
    Filed: May 7, 2012
    Date of Patent: May 12, 2015
    Inventors: Jacques Godin, Martin Grenier, Louis Demers
  • Patent number: 9025629
    Abstract: A laser driver circuit having a differential circuit and an output circuit includes a control circuit receiving a regulated supply voltage that also supplies the differential circuit as an input signal. The control circuit generates a feedback voltage across a first resistor to cause a first current to flow in the first resistor having a current value equal or proportional to the modulation current value. The laser driver circuit includes an operational amplifier receiving the feedback voltage and a reference voltage indicative of a desired modulation current value and to generate the regulated supply voltage. The control circuit and the operational amplifier form a feedback control loop to adjust the regulated supply voltage to regulate the feedback voltage to be equal to the reference voltage, thereby regulating the modulation current value to the desired modulation current value.
    Type: Grant
    Filed: December 3, 2012
    Date of Patent: May 5, 2015
    Assignee: Micrel, Inc.
    Inventors: Bernd Neumann, Dieter Kuehnel, Maik Pohland
  • Publication number: 20150117478
    Abstract: A method for testing a tunable wavelength laser device, which can suppress any error of light transmission characteristics of an etalon, and a tunable wavelength laser device are provided. The method for testing a tunable wavelength laser device is a method for testing a tunable wavelength laser device including a tunable wavelength laser and a wavelength sensing unit having an etalon. The testing method includes a fast step of measuring a free spectral range interval of the etalon, a second step of acquiring a driving condition by tuning a wavelength to a target value provided between a top and a bottom of the free spectral range interval, and a third step of storing the driving condition in a memory.
    Type: Application
    Filed: October 29, 2014
    Publication date: April 30, 2015
    Inventor: Eiichi Banno
  • Publication number: 20150110140
    Abstract: A circuit system includes: a first optoelectronic semiconductor component situated with an n-conductive surface facing an electrically conductive support surface and connected to the support surface in an electrically conductive manner; and a second optoelectronic semiconductor component situated with a p-conductive surface facing the support surface and connected to the support surface in an electrically conductive manner.
    Type: Application
    Filed: April 11, 2013
    Publication date: April 23, 2015
    Inventors: Andreas Letsch, Hans-Jochen Schwarz, Martin Astner
  • Patent number: 8953655
    Abstract: A laser diode (LD) driver to suppress the excess emission of an LD is disclosed. The LD driver has the shunt configuration with a driving transistor connected in parallel to the LD to shunt the bias current provided to the LD. The driver further provides a protection circuit to divide the bias current when the bias current is active but the driving transistor is turned off at an instant of the power on and off of the LD driver.
    Type: Grant
    Filed: November 7, 2013
    Date of Patent: February 10, 2015
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventor: Akihiro Moto
  • Patent number: 8953654
    Abstract: A semiconductor laser driving circuit supplies a drive current to a semiconductor laser diode connected to an output terminal based on an input signal inputted thereto through an input terminal, thereby controlling the semiconductor laser diode. The semiconductor laser driving circuit includes a first supply portion supplying a bias current, and a first supply signal having a frequency component whose frequency is equal to or lower than a first frequency of the input signal, and a second supply portion supplying a second supply signal having a frequency component whose frequency is higher than a second frequency of the input signal.
    Type: Grant
    Filed: October 5, 2012
    Date of Patent: February 10, 2015
    Assignee: Sony Corporation
    Inventors: Katsuya Nakashima, Yoshifumi Miyajima
  • Patent number: 8879594
    Abstract: Systems and methods are provided to efficiently manage power in a laser a driver of an optical network unit (ONU) of a passive optical network (PON). Using information from an allocation map, the expected next allocated schedule for a transmission can be determined. The driver can be efficiently powered down and powered up based on the time remaining between the end of the current burst and the beginning of the next expected burst so that power is not wasted while the laser has no data to transmit.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: November 4, 2014
    Assignee: Broadcom Corporation
    Inventors: Amiad Dvir, Eli Elmoalem, Assaf Koren
  • Publication number: 20140269795
    Abstract: A laser assembly and a method for manufacturing the same are provided according to embodiments of the present disclosure. The laser assembly (900) may comprise a first plate (903) having first projections (918, 928); a printed circuit board assembly (902) including a printed circuit board (912) having first openings (913, 915) and a laser module (100) thereon, and a second plate (901) having second projections (917, 927). The printed circuit board assembly (902) can be retained between the first plate (903) and the second plate (901) by the first projections (918, 928) and the second projections (917, 927). The laser assembly may further comprises a first pad (930) provided between the laser module (100) and the first plate (903) and/or a second pad (920) provided between the laser module (100) and the second plate (901).
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: Emcore Corporation
    Inventors: Boyang Liu, Andrew John Daiber, Yinan Wu
  • Patent number: 8811434
    Abstract: A fiber laser apparatus in which pump light is introduced into an optical fiber to generate laser light includes a detecting section that detects signal light leaking out from a core of the optical fiber as leakage signal light, a determining section that determines that, in a case where there is a decrease in an intensity of the leakage signal light detected in the detecting section, a failure of the fiber has occurred, and a stopping section that stops, in a case where the determining section has determined that a failure of the fiber has occurred, the introduction of the pump light into the optical fiber. The detecting section detects the leakage signal light leaking out of a High Reflectivity FBG that is provided on a side opposite to an output side of the laser light.
    Type: Grant
    Filed: May 28, 2013
    Date of Patent: August 19, 2014
    Assignee: Furukawa Electric Co., Ltd.
    Inventors: Taizo Miyato, Kosuke Kashiwagi, Yoshihiro Emori, Akira Fujisaki
  • Patent number: 8787415
    Abstract: Embodiments for driving a laser diode includes generating a bias current having a duty cycle that is less than 100%. The current level of the bias current is insufficient to turn on the laser diode. A drive current is generated and combined with the bias current to turn on the laser diode almost instantly.
    Type: Grant
    Filed: June 11, 2010
    Date of Patent: July 22, 2014
    Assignee: IXYS Corporation
    Inventor: James Budai
  • Patent number: 8691598
    Abstract: Systems and methods for performing semiconductor laser annealing using dual loop control are disclosed. The first control loop operates at a first frequency and controls the output of the laser and controls the 1/f laser noise. The second control loop also controls the amount of output power in the laser and operates at second frequency lower than the first frequency. The second control loop measures the thermal emission of the wafer over an area the size of one or more die so that within-die emissivity variations are average out when determining the measured annealing temperature. The measured annealing temperature and an annealing temperature set point are used to generate the control signal for the second control loop.
    Type: Grant
    Filed: December 6, 2012
    Date of Patent: April 8, 2014
    Assignee: Ultratech, Inc.
    Inventors: James T. McWhirter, David Gaines, Joseph Lee, Paolo Zambon
  • Patent number: 8665921
    Abstract: An apparatus of automatic power control for burst mode laser transmitter and method are provided. In one implementation a method includes: generating an output current with a modulation pattern determined by a transmit data and a transmit enable signal, and a modulation level determined by a first control code and a second control code, wherein a light signal is generated in response to the output current; generating a first decision based on a comparison between a photodiode current and the first reference current, a second decision based on a comparison between the photodiode current and the second reference current, wherein the photodiode current is generated in accordance to the light signal; and generating the first control code and the second control code in response to the first decision and the second decision.
    Type: Grant
    Filed: January 11, 2012
    Date of Patent: March 4, 2014
    Assignee: Realtek Semiconductor Corp.
    Inventors: Chi-Kung Kuan, Gerchih Chou, Chia-Liang Lin
  • Publication number: 20130334418
    Abstract: An improved laser module for a tunable diode laser spectroscopy analyzer. The improvement is a programmable non-volatile memory device (such as an EEPROM device) attached to the module. In addition, an improved method for updating the laser parameters for a tunable diode laser analyzer when a new laser module is installed in the analyzer. The improvement is the step of reading the parameters from a programmable non-volatile memory device (such as an EEPROM device) attached to the module.
    Type: Application
    Filed: June 17, 2013
    Publication date: December 19, 2013
    Inventors: Alan Cowie, Jie Zhu
  • Patent number: 8605768
    Abstract: The present invention provides a laser apparatus capable of improving a scan speed and achieving a scan rate equal to or more than 1 MHz, and an optical tomographic imaging apparatus using the laser apparatus as a light source. The laser apparatus includes a ring resonator, the ring resonator having a structure in which a first modulator, a normal dispersion region, a second modulator and an anomalous dispersion region are arranged in this order, and in this arrangement, a gain medium is included, and being configured so that modulation with respect to the second modulator can be caused to be phase modulation by periodically superimposing phase modulation on modulation with respect to the first modulator.
    Type: Grant
    Filed: May 11, 2009
    Date of Patent: December 10, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kentaro Furusawa, Natsuhiko Mizutani, Kazuhide Miyata
  • Patent number: 8599892
    Abstract: Provided is a method for controlling a laser oscillator. Such a laser oscillator is applicable to a laser processing machine and includes a plurality of oscillator modules each adapted to be driven to oscillate a laser beam. Also, such a laser oscillator is configured to collect laser beams oscillated by driven modules for output. The method includes determining the number of modules to be driven, of the plurality of oscillator modules.
    Type: Grant
    Filed: April 13, 2012
    Date of Patent: December 3, 2013
    Assignee: Murata Machinery, Ltd.
    Inventor: Takashi Senda
  • Patent number: 8553742
    Abstract: A laser chip package structure includes a printed circuit board (PCB), a flexible circuit board, a laser chip and a number of electronic elements. The PCB includes a supporting surface. The flexible circuit board is positioned on the supporting surface and electrically connected to the PCB. The laser chip is positioned on the flexible circuit board and electrically connected to the flexible circuit board. The laser chip is configured to emit a laser beam. The electronic elements are positioned on the flexible circuit board and electrically connected to the flexible circuit board.
    Type: Grant
    Filed: February 1, 2013
    Date of Patent: October 8, 2013
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Kai-Wen Wu
  • Publication number: 20130259074
    Abstract: A compact CO2 slab-laser is contained in a fluid cooled housing having three compartments. One compartment houses discharge electrodes and a laser resonator. Another compartment houses a radio-frequency power supply (RFPS) assembled on a fluid-cooled chill plate and an impedance-matching network. The remaining compartment houses beam-conditioning optics including a spatial filter. The housing and RFPS chill-plate are on a common coolant-fluid circuit having a single input and a single output. The spatial filter is optionally fluid-coolable on the common coolant fluid circuit.
    Type: Application
    Filed: February 4, 2013
    Publication date: October 3, 2013
    Applicant: COHERENT, INC.
    Inventors: Leon A. NEWMAN, Adrian PAPANIDE, Mathew David RZEWNICKI, Thomas V. HENNESSEY, JR.
  • Patent number: 8502178
    Abstract: An extreme ultraviolet light source apparatus, in which a target material is irradiated with a laser beam from a laser apparatus and the target material is turned into plasma, thereby emitting extreme ultraviolet light, may include a burst control unit configured to control irradiation of the target material is irradiated with the laser beam outputted successively in pulses from the laser apparatus when the extreme ultraviolet light is emitted successively in pulses. The target material is prevented from being turned into plasma by the laser beam while the laser beam is outputted successively in pulses from the laser apparatus when the successive pulsed emission is paused.
    Type: Grant
    Filed: January 12, 2012
    Date of Patent: August 6, 2013
    Assignee: Gigaphoton Inc.
    Inventors: Masato Moriya, Hideyuki Hayashi, Tooru Abe
  • Patent number: 8483250
    Abstract: A semiconductor laser driving device and an image forming apparatus are disclosed that are capable of accurately detecting the deterioration of the semiconductor laser with a smaller circuit size and regardless of the variation of the characteristics of the semiconductor laser and the use conditions of the semiconductor laser by adding a minimum circuit are disclosed. In the semiconductor laser driving device, the output voltage generated by an operational amplifier circuit by amplifying a voltage difference between a monitoring voltage (Vm) and a predetermined reference voltage (Vref) is transmitted to a bias current generating circuit unit as a bias current setting voltage (Vbi) through a sample/hold circuit having a switch (SW1) and a sample/hold capacitor (Csh). When the bias current setting voltage (Vbi) is greater than a predetermined voltage, a deterioration detecting circuit transmits a deterioration detecting signal indicating that the deterioration of the semiconductor laser is detected.
    Type: Grant
    Filed: December 15, 2008
    Date of Patent: July 9, 2013
    Assignee: Ricoh Company, Ltd.
    Inventor: Tomohiko Kamatani
  • Patent number: 8477815
    Abstract: An apparatus is provided. The apparatus includes a lasing element, a laser driver and logic. The laser driver is configured to drive the lasing element at multiple current levels, and the laser driver includes a switching network, multiple direct current (DC) loops, and an output circuit. The switching network receives a differential input signal, and each DC loop is coupled to the switching network. The output circuit is also coupled to the lasing element, and the logic is coupled to each of the DC current loops, where the logic selects one or more of the DC loops in each (of several) modes. Each mode generates one or more output lasing currents for the lasing element that corresponds to a one or more of the current levels in response to the differential input signal.
    Type: Grant
    Filed: September 7, 2011
    Date of Patent: July 2, 2013
    Assignee: Texas Instruments Incorporated
    Inventors: Douglas W. Dean, Jeremy R. Kuehlwein
  • Patent number: 8457499
    Abstract: A semiconductor laser drive apparatus comprises a bias current setting section (232) which sets a bias current value on the basis of the drive temperature so that the temperature characteristic of the bias current value with respect to the drive temperature may be a linear function having a slope except zero and a drive current setting section (233) for setting the drive current value on the basis of the drive temperature so that the temperature characteristic of the drive current value with respect to the drive temperature may be a function having a slope except zero. The temperature characteristic of the bias current and that of the drive current are functions different from each other. With this, low cost, space-saving, and power-saving of a semiconductor laser are achieved, and a semiconductor laser drive apparatus enabling a good transmission characteristic on the reception side and a high optical output over the whole drive temperature range when driving the semiconductor laser can be provided.
    Type: Grant
    Filed: August 8, 2008
    Date of Patent: June 4, 2013
    Assignee: OMRON Corporation
    Inventors: Kentaro Hamana, Akira Enami, Yukari Terakawa, Keisuke Uno, Hayami Hosokawa
  • Publication number: 20130092849
    Abstract: A laser device having master oscillators that output seed beams is provided. The seed beams are guided from the master oscillators to a regenerative amplifier such that at least one of the seed beams enters the regenerative amplifier at an angle that differs from an angle at which another seed beam enters the regenerative amplifier. A laser apparatus and an extreme ultraviolet light generation system using the laser device are also provided.
    Type: Application
    Filed: February 27, 2012
    Publication date: April 18, 2013
    Applicant: GIGAPHOTON INC.
    Inventors: Krzysztof Nowak, Osamu Wakabayashi
  • Patent number: 8406261
    Abstract: A laser driving device includes: a pulse signal generating unit that, after a voltage has risen from a predetermined reference voltage to a predetermined output voltage and a time of a sum of an oscillation period of relaxation oscillation and a light emission start time in a predetermined laser diode has nearly elapsed, generates a pulse signal having a waveform that falls divisionally in two or more stages from the output voltage to the reference voltage; and an output unit that generates a laser drive signal by performing signal processing on the pulse signal and outputs the signal to the laser diode.
    Type: Grant
    Filed: June 2, 2010
    Date of Patent: March 26, 2013
    Assignee: Sony Corporation
    Inventors: Goro Fujita, Tsutomu Maruyama, Seiji Kobayashi
  • Patent number: 8406263
    Abstract: A laser diode read driver includes a first transistor producing a first voltage in response to receiving a first current signal. A transconductor has a first input coupled to receive the first voltage and produces a second current signal in response to differences between signals received on the first input and a second input. A second transistor is coupled to the second input and produces a third current signal in response to receiving the second current signal. A third transistor is coupled to the second transistor and the second input and produces an output current signal in response to receiving the third current signal. The first transistor is scaled to the first transistor by the inverse of a gain factor. First and second resistors are coupled between the first and third transistors and a low voltage supply, and are scaled to each other by the gain factor.
    Type: Grant
    Filed: August 27, 2012
    Date of Patent: March 26, 2013
    Assignee: Texas Instruments Incorporated
    Inventor: Douglas Warren Dean
  • Publication number: 20130064259
    Abstract: A solid-state laser apparatus may include: a master oscillator configured to output laser light having at least one longitudinal mode, the master oscillator being capable of changing the spectral linewidth of the laser light output therefrom; at least one amplifier located downstream of the master oscillator on an optical path; a wavelength converter located downstream of the amplifier on the optical path; a detector configured to detect the spectrum of the laser light; and a controller configured to control the spectral linewidth of the laser light output from the master oscillator based on a detection result of the detector.
    Type: Application
    Filed: November 8, 2012
    Publication date: March 14, 2013
    Applicant: Gigaphoton Inc.
    Inventor: Gigaphoton Inc.
  • Publication number: 20130064258
    Abstract: A master oscillator system may include a grating that functions as one of a plurality of resonator mirrors in an optical resonator, an optical element disposed within an optical path between the plurality of resonator mirrors, and an attitude control mechanism that adjusts an angle at which laser light traveling within the optical resonator is incident on the grating by adjusting the attitude of the optical element.
    Type: Application
    Filed: September 4, 2012
    Publication date: March 14, 2013
    Applicant: Gigaphoton Inc.
    Inventors: Junichi FUJIMOTO, Takahito KUMAZAKI
  • Patent number: 8345722
    Abstract: The present invention provides a method of driving a semiconductor laser, where the method can control changes in the internal temperature of a device as well as control optical output using a driving current. A method of driving a semiconductor laser includes steps of: preliminary driving the semiconductor laser by preliminary activating at a current value larger than a threshold value; de-activating the semiconductor laser, after the step of preliminary driving; and starting a formation of a latent image on a photosensitive drum based on a latent image formation signal, after the step of de-activating.
    Type: Grant
    Filed: March 30, 2011
    Date of Patent: January 1, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takeshi Uchida
  • Publication number: 20120300799
    Abstract: The invention relates to a laser amplification system for generating retrievable laser pulses having at least one laser source, in particular with a pulse selector arranged downstream thereof for the targeted selection of amplifiable laser pulses, a laser medium for amplifying laser pulses generated by the laser source and a loss modulator, wherein the loss modulator is arranged and connected such that said modulator modulates the amplification of the laser pulses by the laser medium by loss generation so that the retrievable laser pulses are provided with a predefined pulse time and/or pulse energy. Before an amplification process for one of the laser pulses, the current amplification of the laser medium is determined and the loss generation is controlled by the loss modulator depending on the current amplification of the laser medium.
    Type: Application
    Filed: February 15, 2011
    Publication date: November 29, 2012
    Applicant: HIGH Q LASER GMBH
    Inventors: Joachim Meier, Maximilian Josef Lederer
  • Patent number: 8310750
    Abstract: A waveform shaping circuit enhances a rise of a waveform of a voltage applied to a load and includes an input unit to which the voltage is input; a supply unit configured to apply the voltage input from the input unit to the load; a first resistor connected in series between the input unit and the supply unit; a second resistor branch-connected to a portion between the input unit and the supply unit; and a stub connected to the first resistor or the second resistor and including a transmission path of a given length configured to shuttle the voltage by transmitting and reflecting the voltage as a voltage wave.
    Type: Grant
    Filed: November 17, 2010
    Date of Patent: November 13, 2012
    Assignee: Fujitsu Limited
    Inventor: Setsuo Yoshida
  • Patent number: 8306080
    Abstract: A surface emitting laser apparatus includes an arithmetic processing unit including an I/O unit for externally inputting an instruction and a core unit that performs an operation based on the instruction and outputs a differential voltage signal modulated with a predetermined amplitude according to a result of the operation, capacitors respectively arranged on output paths of the differential voltage signal, and a surface emitting laser device that is directly connected to the arithmetic processing unit via the capacitors. An I/O voltage and a core voltage are externally supplied to the I/O unit and the core unit, respectively. The arithmetic processing unit generates a driving voltage signal by superimposing the differential voltage signal with the core voltage commonly supplied as a bias voltage without stepping up or down the core voltage and without amplifying the differential voltage signal and supplies the driving voltage signal to the surface emitting laser device.
    Type: Grant
    Filed: April 20, 2011
    Date of Patent: November 6, 2012
    Assignee: Furukawa Electric Co., Ltd.
    Inventors: Keishi Takaki, Naoki Tsukiji, Suguru Imai
  • Patent number: 8300670
    Abstract: A method for deriving precise control over laser power of an optical pickup unit (OPU) includes: providing an analog-to-digital converter (ADC) within an automatic power calibration (APC) circuit to derive a path gain and/or a path offset from the APC circuit; and selectively performing compensation according to the gain and/or the path offset, in order to maintain precision of a relationship between the laser power and a target command utilized for controlling the laser power. An associated APC circuit comprising an ADC and at least one compensation module is further provided. The ADC is utilized for deriving a path gain and/or a path offset from the APC circuit. The compensation module is utilized for selectively performing compensation according to the path gain and/or the path offset, in order to control the laser power by a target command.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: October 30, 2012
    Assignee: Mediatek Inc.
    Inventors: Hsiao-Yuan Chi, Chih-Ching Chen, Chia-Wei Liao
  • Patent number: 8290006
    Abstract: A Dynamically Variable Spot Size (DVSS) laser system for bonding metal components includes an elongated housing containing a light entry aperture coupled to a laser beam transmission cable and a light exit aperture. A plurality of lenses contained within the housing focus a laser beam from the light entry aperture through the light exit aperture. The lenses may be dynamically adjusted to vary the spot size of the laser. A plurality of interoperable safety devices, including a manually depressible interlock switch, an internal proximity sensor, a remotely operated potentiometer, a remotely activated toggle and a power supply interlock, prevent activation of the laser and DVSS laser system if each safety device does not provide a closed circuit. The remotely operated potentiometer also provides continuous variability in laser energy output.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: October 16, 2012
    Assignee: The United States of America as Represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Paul R. Gradl, John F. Hurst, James R. Middleton