Parametric Amplifiers Patents (Class 330/4.5)
  • Patent number: 10247674
    Abstract: An integrated Raman spectrum measurement system and a modularized laser module are provided. The modularized laser module includes a laser emitter and an axis adjustment mechanism. The laser emitter is configured to emit a laser beam. The axis adjustment mechanism is connected to the laser emitter and configured to adjust at least two parameters of axis and orientation of the laser emitter. A beam splitter is disposed on the path of the laser beam. A signal collection unit is for collecting at least a part of a signal light from the beam splitter, wherein the signal light is converting by an object after receiving the part of the laser beam.
    Type: Grant
    Filed: September 11, 2017
    Date of Patent: April 2, 2019
    Assignee: PROTRUSTECH CO., LTD
    Inventors: Chun-Ta Huang, Hsiu-Feng Tung, Wei-Hsin Wang
  • Patent number: 10211798
    Abstract: Techniques relate to an on-chip Josephson parametric converter. A Josephson ring modulator includes four nodes. A lossless on-chip flux line is capacitively coupled to two adjacent nodes of the four nodes of the Josephson ring modulator. The lossless on-chip flux line has an input port configured to receive a pump drive signal that couples differentially to the two adjacent nodes of the of the Josephson ring modulator. The pump drive signal thereby excites a common mode of the on-chip Josephson parametric converter.
    Type: Grant
    Filed: June 27, 2016
    Date of Patent: February 19, 2019
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventor: Baleegh Abdo
  • Patent number: 9740081
    Abstract: A method and apparatus to generate harmonically related laser wavelengths includes a pair of lenses at opposing faces of a non-linear optical material. The lenses are configured to promote incoming and outgoing beams to be normal to each outer lens surface over a range of acceptance angles of the incoming laser beam. This reduces reflection loss for higher efficiency operation. Additionally, the lenses allow a wider range of wavelengths for lasers for more universal application. Examples of the lenses include plano-cylindrical and plano-spherical form factors.
    Type: Grant
    Filed: February 20, 2015
    Date of Patent: August 22, 2017
    Assignee: Iowa State Research Foundation, Inc.
    Inventor: Adam Kaminski
  • Patent number: 9735535
    Abstract: Devices and methods for generating EUV light are disclosed. The device comprises an oscillator having an oscillator cavity length, Lo, and defining an oscillator path and a multi-pass optical amplifier coupled with the oscillator to establish a combined optical cavity including the oscillator path, the combined cavity having a length, Lcombined, where Lcombined=(N+x)*Lo, where ā€œNā€ is an integer and ā€œxā€ is a number between 0.4 and 0.6. The amplifier comprises a polarization discriminating optic inputting light traveling along a first beam path from the oscillator and having substantially a first linear polarization into the amplifier and outputting light having substantially a linear polarization orthogonal to the first polarization out of the amplifier along a second beam path.
    Type: Grant
    Filed: August 6, 2013
    Date of Patent: August 15, 2017
    Assignee: ASML Netherlands B.V.
    Inventors: Alexander I. Ershov, Jerzy R. Hoffman, Norbert R. Bowering, Igor V. Fomenkov
  • Patent number: 9709873
    Abstract: A laser apparatus generating frequency converted light. Embodiments of the laser apparatus described herein apply a cascade of nonlinear frequency mixer for sum frequency generation (SFG) or difference frequency generation (DFG) between two frequency components of a spectrally combined laser beam with at least two spectral components originating from two respective laser sources, SFG of two frequency components beams offers up to a factor of four amplification of output power over SHG of a single laser beam.
    Type: Grant
    Filed: December 15, 2014
    Date of Patent: July 18, 2017
    Assignee: DANMARKS TEKNISKE UNIVERSITET
    Inventors: Anders Kragh Hansen, Ole Bjarlin Jensen, Peter Eskil Andersen, Paul Michael Petersen
  • Patent number: 9548742
    Abstract: An on-chip Josephson parametric converter is provided. The on-chip Josephson parametric converter includes a Josephson ring modulator. The on-chip Josephson parametric converter further includes a lossless power divider, coupled to the Josephson ring modulator, having a single input port and two output ports for receiving a pump drive signal via the single input port, splitting the pump drive signal symmetrically into two signals that are equal in amplitude and phase, and outputting each of the two signals from a respective one of the two output ports. The pump drive signal excites a common mode of the on-chip Josephson parametric converter.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: January 17, 2017
    Assignee: International Business Machines Corporation
    Inventor: Baleegh Abdo
  • Patent number: 9450550
    Abstract: This disclosure provides systems, methods, and apparatus related to a parametric amplifier. In one aspect, a device includes an electron source electrode, a counter electrode, and a pumping electrode. The electron source electrode may include a conductive base and a flexible conductor. The flexible conductor may have a first end and a second end, with the second end of the flexible conductor being coupled to the conductive base. A cross-sectional dimension of the flexible conductor may be less than about 100 nanometers. The counter electrode may be disposed proximate the first end of the flexible conductor and spaced a first distance from the first end of the flexible conductor. The pumping electrode may be disposed proximate a length of the flexible conductor and spaced a second distance from the flexible conductor.
    Type: Grant
    Filed: July 19, 2013
    Date of Patent: September 20, 2016
    Assignee: The Regents of the University of California
    Inventors: Benjamin Jose Aleman, Alexander Zettl
  • Patent number: 9285652
    Abstract: An optical resonator fabricated from a uniaxial birefringent crystal, such as beta barium borate. The crystal is cut with the optical axis not perpendicular to a face of the cut crystal. In some cases the optical axis lies in the plane of the cut crystal face. An incident (input) electromagnetic signal (which can range from the infrared through the visible to the ultraviolet) is applied to the resonator. An output signal is recovered which has a frequency that is an integer multiple of the frequency of the input signal. In some cases a prism is used to evanescently couple the input and the output signals to the resonator.
    Type: Grant
    Filed: June 21, 2013
    Date of Patent: March 15, 2016
    Assignee: CALIFORNIA INSTITUTE OF TECHNOLOGY
    Inventors: Nan Yu, Dmitry V. Strekalov, Guoping Lin
  • Patent number: 9240671
    Abstract: A laser light source (100) includes a laser element (102) that emits a fundamental wave, a wavelength converting element (104) that performs wavelength conversion on the fundamental wave emitted from the laser element (102) and outputs the converted wave, and an optical waveguide (103) that guides the light output from the wavelength converting element (104). The optical waveguide (103) has a direction changing portion (113) that changes the travel direction of the guided light. The direction changing portion (113) has a function of transmitting the converted wave alone and of not transmitting the fundamental wave.
    Type: Grant
    Filed: October 29, 2012
    Date of Patent: January 19, 2016
    Assignee: CITIZEN HOLDINGS CO., LTD.
    Inventor: Masafumi Ide
  • Patent number: 8901997
    Abstract: A solid state detection system includes a degenerate photo-parametric amplifier (PPA), wherein the PPA comprises a photo diode, and a periodically pulsed light source, wherein the photo-parametric amplifier (PPA) is synchronized to the pulsed light source with a phase locked loop that generates a pump waveform for the PPA at twice the frequency of the excitation pulse rate.
    Type: Grant
    Filed: November 16, 2011
    Date of Patent: December 2, 2014
    Assignee: The Brain Window, Inc.
    Inventor: Andreas G. Nowatzyk
  • Publication number: 20140266421
    Abstract: This disclosure provides systems, methods, and apparatus related to a parametric amplifier. In one aspect, a device includes an electron source electrode, a counter electrode, and a pumping electrode. The electron source electrode may include a conductive base and a flexible conductor. The flexible conductor may have a first end and a second end, with the second end of the flexible conductor being coupled to the conductive base. A cross-sectional dimension of the flexible conductor may be less than about 100 nanometers. The counter electrode may be disposed proximate the first end of the flexible conductor and spaced a first distance from the first end of the flexible conductor. The pumping electrode may be disposed proximate a length of the flexible conductor and spaced a second distance from the flexible conductor.
    Type: Application
    Filed: July 19, 2013
    Publication date: September 18, 2014
    Applicant: The Regents of the University of California
    Inventors: Benjamin Jose Aleman, Alexander Zettl
  • Patent number: 8742840
    Abstract: A travelling wave tube amplifier includes: a travelling wave tube comprising a cathode, a helix, an RF input, an RF output, and a plurality of collectors, and an electronic power conditioner providing power supply and electrode polarization to said travelling wave tube, wherein said electronic power conditioner comprises flexibility control means allowing to adjust, via control commands sent through a databus, the helix to cathode voltage and the collector voltages.
    Type: Grant
    Filed: October 20, 2011
    Date of Patent: June 3, 2014
    Assignee: Thales
    Inventors: Etienne Cuignet, Philippe Fayt, Emile Tonello
  • Patent number: 7990210
    Abstract: An amplifier is provided which includes: a first variable capacitance device of which capacitance is variable, a second variable capacitance device of which capacitance is variable, electrically connected to the first variable capacitance device, and of an inverse conductivity type from the first variable capacitance device, and a first input unit for selectively inputting a bias voltage and a voltage signal to the first variable capacitance device and the second variable capacitance device, wherein, in the event that the bias voltage and the voltage signal are input to the first variable capacitance device and the second variable capacitance device, the capacitance of the first variable capacitance device and the second variable capacitance device is taken as a first value, and wherein the voltage signal is amplified with the capacitance of the first variable capacitance device and the second variable capacitance device as a second value smaller than the first value.
    Type: Grant
    Filed: September 4, 2007
    Date of Patent: August 2, 2011
    Assignee: Sony Corporation
    Inventors: Sachio Iida, Atsushi Yoshizawa
  • Patent number: 7911257
    Abstract: A circuit includes an input terminal adapted to receive an input voltage, a MOSFET having its drain terminal and its source terminal connected together, a first switching arrangement configured to be controlled by a first clock signal and adapted to selectively couple the gate terminal to the input terminal, and a further switching arrangement configured to be controlled by a further clock signal in timing relationship with the first clock signal and adapted to selectively couple the source terminal and a first voltage which is capable of pulling carriers out of a channel when the first switching arrangement is not coupling the input terminal to the gate terminal.
    Type: Grant
    Filed: April 10, 2009
    Date of Patent: March 22, 2011
    Assignee: The Trustees of Columbia University in the city of New York
    Inventors: Yannis Tsividis, Sanjeev Ranganathan
  • Publication number: 20100253349
    Abstract: A parametric amplifier device has a two port parametric amplifier, a DC voltage generator and a DC bias regulator. The bias regulator has a voltage regulator, an attenuator and a summer. Output voltages from the regulator and the attenuator are added in the summer.
    Type: Application
    Filed: April 2, 2010
    Publication date: October 7, 2010
    Inventors: Peter Cork, Anthony Peter Hulbert, John Hunt
  • Patent number: 7630126
    Abstract: Two-pump optical parametric devices (OPDs), and methods of operating the same, generate desired output signals and idlers having reduced stimulated Raman scattering (SRS) noise levels. When the two-pump OPD is used as a two-pump optical parametric amplifier (OPA), the pumps are polarized perpendicular to each other, and the lower-frequency sideband (signal or idler) is polarized parallel to the lower-frequency pump (perpendicular to the higher-frequency pump). The desired output may be an amplified signal or a generated idler. When the two-pump OPD is used as a two-pump optical frequency converter (OFC), the pumps can be polarized parallel to one another, in which case the signal and idler are both perpendicular to the pumps, or perpendicular to one another, in which case the lower-frequency sideband (signal or idler) is polarized parallel to the lower-frequency pump (perpendicular to the higher-frequency pump).
    Type: Grant
    Filed: June 30, 2005
    Date of Patent: December 8, 2009
    Assignee: Alcatel-Lucent USA Inc.
    Inventor: Colin J. McKinstrie
  • Publication number: 20080130097
    Abstract: Two-pump optical parametric devices (OPDs), and methods of operating the same, generate desired output signals and idlers having reduced stimulated Raman scattering (SRS) noise levels. When the two-pump OPD is used as a two-pump optical parametric amplifier (OPA), the pumps are polarized perpendicular to each other, and the lower-frequency sideband (signal or idler) is polarized parallel to the lower-frequency pump (perpendicular to the higher-frequency pump). The desired output may be an amplified signal or a generated idler. When the two-pump OPD is used as a two-pump optical frequency converter (OFC), the pumps can be polarized parallel to one another, in which case the signal and idler are both perpendicular to the pumps, or perpendicular to one another, in which case the lower-frequency sideband (signal or idler) is polarized parallel to the lower-frequency pump (perpendicular to the higher-frequency pump).
    Type: Application
    Filed: June 30, 2005
    Publication date: June 5, 2008
    Inventor: Colin J. McKinstrie
  • Patent number: 7164526
    Abstract: An optical parametric amplifier (OPA) driven with at least two pump waves. The pump waves may be configured such that the OPA produces uniform exponential gain over a range of wavelengths that extends, for example, at least 30 nm on either side of the average pump-wave wavelength. In addition, since the Brillouin scattering limit applies to each pump wave independently, substantially twice the amount of energy may be pumped into an OPA of the present invention compared to that in the corresponding single pump-wave OPA of the prior art. An OPA of the present invention may be used in a WDM communication system and configured for simultaneous signal amplification and wavelength conversion.
    Type: Grant
    Filed: February 28, 2005
    Date of Patent: January 16, 2007
    Assignee: Lucent Technologies Inc.
    Inventors: Colin J. McKinstrie, Stoian Radic
  • Patent number: 6870664
    Abstract: A system provides an input pump pulse and a signal pulse. A first dichroic beamsplitter is highly reflective for the input signal pulse and highly transmissive for the input pump pulse. A first optical parametric amplifier nonlinear crystal transfers part of the energy from the input pump pulse to the input signal pulse resulting in a first amplified signal pulse and a first depleted pump pulse. A second dichroic beamsplitter is highly reflective for the first amplified signal pulse and highly transmissive for the first depleted pump pulse. A second optical parametric amplifier nonlinear crystal transfers part of the energy from the first depleted pump pulse to the first amplified signal pulse resulting in a second amplified signal pulse and a second depleted pump pulse. A third dichroic beamsplitter receives the second amplified signal pulse and the second depleted pump pulse. The second depleted pump pulse is discarded.
    Type: Grant
    Filed: December 11, 2002
    Date of Patent: March 22, 2005
    Assignee: The Regents of the University of California
    Inventors: Igor Jovanovic, Christopher A. Ebbers
  • Patent number: 6611168
    Abstract: A micromachined variable capacitor structure is used as a modulation mechanism for a differential parametric amplifier. The capacitance of the capacitor structure is modulated by a control signal while a differential signal is applied to the capacitor structure. Modulation of the capacitance produces a signal representative of the input differential voltage. This signal is provided to an amplifier. Once the signal is amplified, a demodulator demodulates the amplified signal to provide an amplified version of the differential signal. The variable capacitor structure also allows for internal feedback, which permits the parametric amplifier to be used as a galvanically isolated differential measurement amplifier. A number of techniques are used to remove common mode and other errors from the modulated difference signal, thereby eliminating them from the amplified output.
    Type: Grant
    Filed: December 19, 2001
    Date of Patent: August 26, 2003
    Assignee: Analog Devices, Inc.
    Inventors: Timothy J. Denison, Thomas W. Kelly
  • Publication number: 20020027472
    Abstract: The present invention disclosure a multi-stage bidirectional optical amplifier that amplifies counter-propagating signals at the same time. The multi-stage bidirectional optical amplifier in accordance with the present invention comprises two single-stage bidirectional optical amplifiers(30a, 30b), two multiple reflection suppression means(28a, 28b) and a mid-stage component(42).
    Type: Application
    Filed: July 26, 2001
    Publication date: March 7, 2002
    Applicant: Korea Advanced Institute of Science and Technology
    Inventors: Chang Hee Lee, Hyun Deok Kim, Tae Won Oh, Shin Jeong Hun, Cho Yun Hee
  • Publication number: 20020021166
    Abstract: An optical amplifier contains two amplifier paths. An optical user signal (&agr;, &bgr;) is in each case supplied to an optical amplifier (EDF1, EDF2) through direction separators (RT1, RT2). Each amplifier is followed by a wavelength multiplexer (WDM1, WDM2) via which a pump signal (&ggr;1, &ggr;2) is fed in, which, via the direction separator (RT2, RT1) which is connected to its output, pumps the amplifier (EDF2, EDF1) in the other amplifier path in the direction of the user signal (&agr;, &bgr;).
    Type: Application
    Filed: August 16, 2001
    Publication date: February 21, 2002
    Inventor: Lutz Rapp
  • Patent number: 6281746
    Abstract: A microwave parametric amplifier uses a circulator to receive an input signal which is provided through a transfer port to an input signal resonant cavity. A pump signal, which is preferably a harmonic of the input signal, is received into a pump signal cavity which is defined by a barrier that is reflective to the pump signal and transmissive to the input signal. A non-linear medium is positioned within the pump signal cavity to produce carriers due to the energy of the pump signal. The input signal interacts with the carriers to produce an amplified input signal which is conveyed from the input signal cavity through the circulator to an output port of the circulator.
    Type: Grant
    Filed: December 16, 1999
    Date of Patent: August 28, 2001
    Assignee: Lockheed Martin Corporation
    Inventor: James Richard Wood
  • Patent number: 6265934
    Abstract: A Q-switched parametric cavity microwave amplifier has input and output ports for receiving an input signal and producing a switched amplified output signal. A pump signal, preferably at a harmonic of the input signal, is received through a pump signal port and provided to a pump signal cavity within a housing. The pump signal interacts with a non-linear medium to produce carriers. A frequency selective layer reflects the pump signal but permits the input signal to pass therethrough. The input signal interacts with the carriers produced in the non-linear medium to enhance the signal present within the resonant cavity for the input signal. This transfers energy from the pump signal to the lower frequency input signal. A Q-switch is positioned in series with the output waveguide to cause energy to be stored within the input signal cavity. When the Q-switch is opened, a pulse is produced representing an amplified version of the input signal.
    Type: Grant
    Filed: December 16, 1999
    Date of Patent: July 24, 2001
    Assignee: Lockheed Martin Corporation
    Inventor: James Richard Wood