Patents by Inventor Xinhua Gu

Xinhua Gu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10256597
    Abstract: The invention describes classes of robust fiber laser systems usable as pulse sources for Nd: or Yb: based regenerative amplifiers intended for industrial settings. The invention modifies adapts and incorporates several recent advances in FCPA systems to use as the input source for this new class of regenerative amplifier.
    Type: Grant
    Filed: February 22, 2017
    Date of Patent: April 9, 2019
    Assignee: IMRA AMERICA, INC.
    Inventors: Donald J. Harter, Gyu C. Cho, Zhenlin Liu, Martin E. Fermann, Xinhua Gu, Salvatore F. Nati, Lawrence Shah, Ingmar Hartl, Mark Bendett
  • Publication number: 20170179676
    Abstract: The invention describes classes of robust fiber laser systems usable as pulse sources for Nd: or Yb: based regenerative amplifiers intended for industrial settings. The invention modifies adapts and incorporates several recent advances in FCPA systems to use as the input source for this new class of regenerative amplifier.
    Type: Application
    Filed: February 22, 2017
    Publication date: June 22, 2017
    Applicant: IMRA AMERICA, INC.
    Inventors: Donald J. HARTER, Gyu C. CHO, Zhenlin LIU, Martin E. FERMANN, Xinhua GU, Salvatore F. NATI, Lawrence SHAH, Ingmar HARTL, Mark BENDETT
  • Patent number: 9640940
    Abstract: A pulsed laser comprises an oscillator and amplifier. An attenuator and/or pre-compressor may be disposed between the oscillator and amplifier to improve performance and possibly the quality of pulses output from the laser. Such pre-compression may be implemented with spectral filters and/or dispersive elements between the oscillator and amplifier. The pulsed laser may have a modular design comprising modular devices that may have Telcordia-graded quality and reliability. Fiber pigtails extending from the device modules can be spliced together to form laser system. In one embodiment, a laser system operating at approximately 1050 nm comprises an oscillator having a spectral bandwidth of approximately 19 nm. This oscillator signal can be manipulated to generate a pulse having a width below approximately 90 fs. A modelocked linear fiber laser cavity with enhanced pulse-width control includes concatenated sections of both polarization-maintaining and non-polarization-maintaining fibers.
    Type: Grant
    Filed: April 13, 2015
    Date of Patent: May 2, 2017
    Assignee: IMRA America, Inc.
    Inventors: Xinhua Gu, Mark Bendett, Gyu Cheon Cho, Martin E. Fermann
  • Patent number: 9590386
    Abstract: The invention describes classes of robust fiber laser systems usable as pulse sources for Nd: or Yb: based regenerative amplifiers intended for industrial settings. The invention modifies adapts and incorporates several recent advances in FCPA systems to use as the input source for this new class of regenerative amplifier.
    Type: Grant
    Filed: September 10, 2014
    Date of Patent: March 7, 2017
    Assignee: IMRA AMERICA, INC.
    Inventors: Donald J. Harter, Gyu C. Cho, Zhenlin Liu, Martin E. Fermann, Xinhua Gu, Salvatore F. Nati, Lawrence Shah, Ingmar Hartl, Mark Bendett
  • Publication number: 20150325977
    Abstract: A pulsed laser comprises an oscillator and amplifier. An attenuator and/or pre-compressor may be disposed between the oscillator and amplifier to improve performance and possibly the quality of pulses output from the laser. Such pre-compression may be implemented with spectral filters and/or dispersive elements between the oscillator and amplifier. The pulsed laser may have a modular design comprising modular devices that may have Telcordia-graded quality and reliability. Fiber pigtails extending from the device modules can be spliced together to form laser system. In one embodiment, a laser system operating at approximately 1050 nm comprises an oscillator having a spectral bandwidth of approximately 19 nm. This oscillator signal can be manipulated to generate a pulse having a width below approximately 90 fs. A modelocked linear fiber laser cavity with enhanced pulse-width control includes concatenated sections of both polarization-maintaining and non-polarization-maintaining fibers.
    Type: Application
    Filed: April 13, 2015
    Publication date: November 12, 2015
    Inventors: Xinhua Gu, Mark Bendett, Gyu Cheon Cho, Martin E. Fermann
  • Patent number: 9071037
    Abstract: A pulsed laser comprises an oscillator and amplifier. An attenuator and/or pre-compressor may be disposed between the oscillator and amplifier to improve performance and possibly the quality of pulses output from the laser. Such pre-compression may be implemented with spectral filters and/or dispersive elements between the oscillator and amplifier. The pulsed laser may have a modular design comprising modular devices that may have Telcordia-graded quality and reliability. Fiber pigtails extending from the device modules can be spliced together to form laser system. In one embodiment, a laser system operating at approximately 1050 nm comprises an oscillator having a spectral bandwidth of approximately 19 nm. This oscillator signal can be manipulated to generate a pulse having a width below approximately 90 fs. A modelocked linear fiber laser cavity with enhanced pulse-width control includes concatenated sections of both polarization-maintaining and non-polarization-maintaining fibers.
    Type: Grant
    Filed: August 28, 2013
    Date of Patent: June 30, 2015
    Assignee: IMRA America, Inc.
    Inventors: Xinhua Gu, Mark Bendett, Gyu Cheon Cho, Martin E. Fermann
  • Publication number: 20150085885
    Abstract: A pulsed laser comprises an oscillator and amplifier. An attenuator and/or pre-compressor may be disposed between the oscillator and amplifier to improve performance and possibly the quality of pulses output from the laser. Such pre-compression may be implemented with spectral filters and/or dispersive elements between the oscillator and amplifier. The pulsed laser may have a modular design comprising modular devices that may have Telcordia-graded quality and reliability. Fiber pigtails extending from the device modules can be spliced together to form laser system. In one embodiment, a laser system operating at approximately 1050 nm comprises an oscillator having a spectral bandwidth of approximately 19 nm. This oscillator signal can be manipulated to generate a pulse having a width below approximately 90 fs. A modelocked linear fiber laser cavity with enhanced pulse-width control includes concatenated sections of both polarization-maintaining and non-polarization-maintaining fibers.
    Type: Application
    Filed: August 28, 2013
    Publication date: March 26, 2015
    Applicant: IMRA America, Inc.
    Inventors: Xinhua Gu, Mark Bendett, Gyu Cheon Cho, Martin E. Fermann
  • Publication number: 20140376084
    Abstract: The invention describes classes of robust fiber laser systems usable as pulse sources for Nd: or Yb: based regenerative amplifiers intended for industrial settings. The invention modifies adapts and incorporates several recent advances in FCPA systems to use as the input source for this new class of regenerative amplifier.
    Type: Application
    Filed: September 10, 2014
    Publication date: December 25, 2014
    Applicant: IMRA AMERICA, INC.
    Inventors: Donald J. HARTER, Gyu C. CHO, Zhenlin LIU, Martin E. FERMANN, Xinhua GU, Salvatore F. NATI, Lawrence SHAH, Ingmar HARTL, Mark BENDETT
  • Patent number: 8873594
    Abstract: A modular ultrafast pulse laser system is constructed of individually pre-tested components manufactured as modules. The individual modules include an oscillator, pre-amplifier and power amplifier stages, a non-linear amplifier, and a stretcher and compressor. The individual modules can typically be connected by means of simple fiber splices.
    Type: Grant
    Filed: April 6, 2010
    Date of Patent: October 28, 2014
    Assignee: IMRA America, Inc.
    Inventors: Zhenlin Liu, Gyu Choen Cho, Xinhua Gu, Otho E. Ulrich, Jr., Donald J. Harter
  • Patent number: 8855151
    Abstract: The invention describes classes of robust fiber laser systems usable as pulse sources for Nd: or Yb: based regenerative amplifiers intended for industrial settings. The invention modifies adapts and incorporates several recent advances in FCPA systems to use as the input source for this new class of regenerative amplifier.
    Type: Grant
    Filed: July 5, 2013
    Date of Patent: October 7, 2014
    Assignee: Imra America, Inc.
    Inventors: Donald J. Harter, Gyu C. Cho, Zhenlin Liu, Martin E. Fermann, Xinhua Gu, Salvatore F. Nati, Lawrence Shah, Ingmar Hartl, Mark Bendett
  • Publication number: 20130293941
    Abstract: The invention describes classes of robust fiber laser systems usable as pulse sources for Nd: or Yb: based regenerative amplifiers intended for industrial settings. The invention modifies adapts and incorporates several recent advances in FCPA systems to use as the input source for this new class of regenerative amplifier.
    Type: Application
    Filed: July 5, 2013
    Publication date: November 7, 2013
    Inventors: Donald J. HARTER, Gyu C. CHO, Zhenlin LIU, Martin E. FERMANN, Xinhua GU, Salvatore F. NATI, Lawrence SHAH, Ingmar HARTL, Mark BENDETT
  • Patent number: 8537864
    Abstract: A pulsed laser comprises an oscillator and amplifier. An attenuator and/or pre-compressor may be disposed between the oscillator and amplifier to improve performance and possibly the quality of pulses output from the laser. Such pre-compression may be implemented with spectral filters and/or dispersive elements between the oscillator and amplifier. The pulsed laser may have a modular design comprising modular devices that may have Telcordia-graded quality and reliability. Fiber pigtails extending from the device modules can be spliced together to form laser system. In one embodiment, a laser system operating at approximately 1050 nm comprises an oscillator having a spectral bandwidth of approximately 19 nm. This oscillator signal can be manipulated to generate a pulse having a width below approximately 90 fs.
    Type: Grant
    Filed: June 14, 2010
    Date of Patent: September 17, 2013
    Assignee: IMRA America, Inc.
    Inventors: Xinhua Gu, Mark Bendett, Gyu Cheon Cho
  • Publication number: 20120008649
    Abstract: A pulsed laser comprises an oscillator and amplifier. An attenuator and/or pre-compressor may be disposed between the oscillator and amplifier to improve performance and possibly the quality of pulses output from the laser. Such pre-compression may be implemented with spectral filters and/or dispersive elements between the oscillator and amplifier. The pulsed laser may have a modular design comprising modular devices that may have Telcordia-graded quality and reliability. Fiber pigtails extending from the device modules can be spliced together to form laser system. In one embodiment, a laser system operating at approximately 1050 nm comprises an oscillator having a spectral bandwidth of approximately 19 nm. This oscillator signal can be manipulated to generate a pulse having a width below approximately 90 fs.
    Type: Application
    Filed: June 14, 2010
    Publication date: January 12, 2012
    Applicant: IMRA AMERICA, INC.
    Inventors: Xinhua Gu, Mark Bendett, Gyu Cheon Cho
  • Patent number: 8094691
    Abstract: The invention describes classes of robust fiber laser systems usable as pulse sources for Nd: or Yb: based regenerative amplifiers intended for industrial settings. The invention modifies adapts and incorporates several recent advances in FCPA systems to use as the input source for this new class of regenerative amplifier.
    Type: Grant
    Filed: June 15, 2010
    Date of Patent: January 10, 2012
    Assignee: Imra America, Inc.
    Inventors: Donald Harter, Gyu Cho, Zhenlin Liu, Martin Fermann, Xinhua Gu, Salvatore Nati, Lawrence Shah, Ingmar Hartl, Mark Bendett
  • Patent number: 7907334
    Abstract: A chirped pulse amplifier (CPA) system having a mode-locked laser and a high-speed pulse selector, wherein the pulse selector modulates output pulses based upon an applied modulation voltage. A pulse selector may be an integrated electro-optic modulator, for example a LiNbO3 modulator, or an electro-absorption modulator. Difficulties related to free-space alignment and operational stability of some prior designs are reduced or eliminated. Fiber coupling generally simplifies beam delivery and alignment. Some embodiments include an erbium fiber (or erbium-ytterbium) based CPA system operating at a wavelength of approximately 1550 nanometers. Similar performance can be obtained at other wavelengths, for example a 1.06 micrometer Yb-doped fiber system. Moreover, high amplification and peak intensity at the output may be achieved while avoiding non-linear effects in the pulse selector, thereby providing for high intensity picosecond or femtosecond operation.
    Type: Grant
    Filed: July 14, 2009
    Date of Patent: March 15, 2011
    Assignee: Imra America, Inc.
    Inventors: Xinhua Gu, Yuzuru Uehara, Donald Harter
  • Publication number: 20100272129
    Abstract: The invention describes classes of robust fiber laser systems usable as pulse sources for Nd: or Yb: based regenerative amplifiers intended for industrial settings. The invention modifies adapts and incorporates several recent advances in FCPA systems to use as the input source for this new class of regenerative amplifier.
    Type: Application
    Filed: June 15, 2010
    Publication date: October 28, 2010
    Applicant: IMRA America, Inc.
    Inventors: Donald J. HARTER, Gyu CHO, Zhenlin LIU, Martin FERMANN, Xinhua GU, Salvatore F. NATI, Lawrence SHAH, Ingmar HARTL, Mark Bendett
  • Patent number: 7804864
    Abstract: A pulsed laser comprises an oscillator and amplifier. An attenuator and/or pre-compressor may be disposed between the oscillator and amplifier to improve performance and possibly the quality of pulses output from the laser. Such pre-compression may be implemented with spectral filters and/or dispersive elements between the oscillator and amplifier. The pulsed laser may have a modular design comprising modular devices that may have Telcordia-graded quality and reliability. Fiber pigtails extending from the device modules can be spliced together to form laser system. In one embodiment, a laser system operating at approximately 1050 nm comprises an oscillator having a spectral bandwidth of approximately 19 nm. This oscillator signal can be manipulated to generate a pulse having a width below approximately 90 fs.
    Type: Grant
    Filed: March 31, 2004
    Date of Patent: September 28, 2010
    Assignee: IMRA America, Inc.
    Inventors: Xinhua Gu, Mark Bendett, Gyu Choen Cho
  • Publication number: 20100188736
    Abstract: A modular ultrafast pulse laser system is constructed of individually pre-tested components manufactured as modules. The individual modules include an oscillator, pre-amplifier and power amplifier stages, a non-linear amplifier, and a stretcher and compressor. The individual modules can typically be connected by means of simple fiber splices.
    Type: Application
    Filed: April 6, 2010
    Publication date: July 29, 2010
    Applicant: IMRA AMERICA, INC.
    Inventors: Zhenlin LIU, Gyu Choen CHO, Xinhua GU, Otho E. ULRICH, JR., Donald J. HARTER
  • Patent number: 7711013
    Abstract: A modular ultrafast pulse laser system is constructed of individually pre-tested components manufactured as modules. The individual modules include an oscillator, pre-amplifier and power amplifier stages, a non-linear amplifier, and a stretcher and compressor. The individual modules can typically be connected by means of simple fiber splices.
    Type: Grant
    Filed: March 31, 2004
    Date of Patent: May 4, 2010
    Assignee: IMRA America, Inc.
    Inventors: Zhenlin Liu, Gyu Choen Cho, Xinhua Gu, Otho E. Ulrich, Jr., Donald J. Harter
  • Patent number: 7668213
    Abstract: A method and apparatus for detecting and controlling the conditions needed for starting and maintaining mode-locked operation of a laser system including a fiber oscillator and high power fiber amplifier. The invention is used to monitor the output power and repetition rate of the fiber oscillator and control the operation of the oscillator such that the oscillator obtains and maintains correct mode-locked operation despite changes in environmental conditions such as temperature, and also with changes due to component aging or degradation.
    Type: Grant
    Filed: December 30, 2004
    Date of Patent: February 23, 2010
    Assignee: IMRA America, Inc.
    Inventors: Robert Hoffman, Salvatore F. Nati, Jr., Xinhua Gu, Zhenlin Liu