Patents Assigned to General Photonics Corporation
  • Patent number: 10324002
    Abstract: The disclosed technology includes, among others, methods and devices for measuring distributed fiber bend or stress related characteristics along an optical path of fiber under test (FUT) uses both a light input unit and a light output unit connected to the FUT at one single end.
    Type: Grant
    Filed: August 1, 2017
    Date of Patent: June 18, 2019
    Assignee: General Photonics Corporation
    Inventors: Hongxin Chen, Xiaojun Chen, Xiaotian Steve Yao
  • Patent number: 10156677
    Abstract: Optical designs and techniques for providing compact optical delay lines by using a dual fiber collimator structured to include (1) an input fiber line that receives and guides an input light beam, (2) an output fiber line that guides and exports an output light beam that has an optical delay relative to the input light beam, and (3) a collimating lens placed on one side of end facets of the input and output fiber lines to receive the input light beam from the input fiber line and to output the output beam light to the output fiber line.
    Type: Grant
    Filed: May 9, 2018
    Date of Patent: December 18, 2018
    Assignee: General Photonics Corporation
    Inventor: Xiaotian Steve Yao
  • Patent number: 9829410
    Abstract: The disclosed technology in this patent document includes, among others, methods and apparatus for distributed measuring at least one of fiber bend or stress related characteristics along an optical path of a fiber under test (FUT) using both a light input unit and a light output unit connected to the FUT at one single end.
    Type: Grant
    Filed: April 25, 2017
    Date of Patent: November 28, 2017
    Assignee: General Photonics Corporation
    Inventors: Hongxin Chen, Xiaojun Chen, Xiaotian Steve Yao
  • Patent number: 9719883
    Abstract: The disclosed technology includes, among others, methods and devices for measuring distributed fiber bend or stress related characteristics along an optical path of fiber under test (FUT) uses both a light input unit and a light output unit connected to the FUT at one single end.
    Type: Grant
    Filed: June 10, 2014
    Date of Patent: August 1, 2017
    Assignee: General Photonics Corporation
    Inventors: Hongxin Chen, Xiaojun Chen, Xiaotian Steve Yao
  • Patent number: 9689666
    Abstract: Techniques and devices for measuring polarization crosstalk in polarization maintaining fiber by placing the PM fiber in a 1-dimensional or 2-dimensional configuration for sensing stress or strain exerted on the PM fiber at different locations along the fiber with a high spatial sensing resolution.
    Type: Grant
    Filed: March 5, 2015
    Date of Patent: June 27, 2017
    Assignee: General Photonics Corporation
    Inventors: Xiaotian Steve Yao, Yao Yao, Xiaojun Chen
  • Patent number: 9632006
    Abstract: The disclosed technology in this patent document includes, among others, methods apparatus for distributed measuring at least one fiber bend or stress related characteristics along an optical path of fiber under test (FUT) uses both a light input unit and a light output unit connected to the FUT at one single end.
    Type: Grant
    Filed: June 10, 2014
    Date of Patent: April 25, 2017
    Assignee: General Photonics Corporation
    Inventors: Hongxin Chen, Xiaojun Chen, Xiaotian Steve Yao
  • Patent number: 9600911
    Abstract: Imaging devices and processing techniques based on imaging information along the depth direction in an optical coherent tomography (OCT) image are disclosed to enhance observed morphological features. The methods and systems obtain different OCT images of the target object under different reference path lengths, process the different OCT images to obtain a derivative with respect to the signal path length of image information of the different images, and processing the derivative to extract improved image information of the target object. The derivatives may be in a form related to a gradient value of the normalized OCT image intensity, or an attenuation coefficient.
    Type: Grant
    Filed: June 2, 2014
    Date of Patent: March 21, 2017
    Assignees: General Photonics Corporation, Suzhou Optoring Technology Co. Ltd.
    Inventors: Longzhi Wang, Zhuo Meng, Haimin Yu, Xiaotian Steve Yao
  • Patent number: 9476699
    Abstract: Techniques and devices for measuring stress, strain, or temperature based on polarization crosstalk analysis in birefringence optical birefringent media including polarization maintaining fiber. The disclosed techniques and devices can be implemented to measure polarization crosstalk distribution in polarization maintaining fiber by placing the PM fiber in a 1-dimensional or 2-dimensional configuration for sensing temperature, stress or strain in the PM fiber at different locations along the fiber with a high spatial sensing resolution. In some implementations, the disclosed techniques and devices can be implemented to simultaneously measure stress, strain and temperature from analyzing the probe light. For example, both temperature and stress/strain can be simultaneously measured by using the same sensors to extract and separate temperature measurements from stress/strain measurements.
    Type: Grant
    Filed: March 5, 2015
    Date of Patent: October 25, 2016
    Assignee: General Photonics Corporation
    Inventor: Xiaotian Steve Yao
  • Patent number: 9041935
    Abstract: Techniques and devices for measuring polarization crosstalk in birefringence optical media including polarization maintaining fiber.
    Type: Grant
    Filed: May 29, 2012
    Date of Patent: May 26, 2015
    Assignee: General Photonics Corporation
    Inventors: Xiaotian Steve Yao, Xiaojun Chen
  • Publication number: 20140355856
    Abstract: Imaging devices and processing techniques based on imaging information along the depth direction in an optical coherent tomography (OCT) image are disclosed to enhance observed morphological features. The methods and systems obtain different OCT images of the target object under different reference path lengths, process the different OCT images to obtain a derivative with respect to the signal path length of image information of the different images, and processing the derivative to extract improved image information of the target object. The derivatives may be in a form related to a gradient value of the normalized OCT image intensity, or an attenuation coefficient.
    Type: Application
    Filed: June 2, 2014
    Publication date: December 4, 2014
    Applicants: GENERAL PHOTONICS CORPORATION, SUZHOU OPTORING TECHNOLOGY CO. LTD.
    Inventors: Longzhi Wang, Zhuo Meng, Haimin Yu, Xiaotian Steve Yao
  • Patent number: 8787755
    Abstract: Techniques, devices and applications are provided for monitoring a polarization mode dispersion (PMD) effect in an optical signal.
    Type: Grant
    Filed: April 15, 2013
    Date of Patent: July 22, 2014
    Assignee: General Photonics Corporation
    Inventor: Xiaotian Steve Yao
  • Patent number: 8780433
    Abstract: Techniques and devices use cascaded optical polarization devices having modulated optical retardation to control optical polarization of light and can be configured for polarization scrambling. Uniform rate scrambling and quasi-uniform rate scrambling modes are provided in described devices and rate-additive designs based on multiple cascaded devices are also disclosed to achieve high-speed scrambling.
    Type: Grant
    Filed: September 28, 2011
    Date of Patent: July 15, 2014
    Assignee: General Photonics Corporation
    Inventors: Leon Yao, Xiaojun Chen
  • Publication number: 20130321818
    Abstract: Techniques and devices for measuring polarization crosstalk in birefringence optical media including polarization maintaining fiber.
    Type: Application
    Filed: May 29, 2012
    Publication date: December 5, 2013
    Applicant: General Photonics Corporation
    Inventors: XIAOTIAN STEVE YAO, Xiaojun Chen
  • Patent number: 8599385
    Abstract: Techniques and devices for measuring the distribution of polarization crosstalk in birefringence optical media including polarization maintaining fiber based on suppressing the number and magnitude of ghost interference peaks.
    Type: Grant
    Filed: May 14, 2010
    Date of Patent: December 3, 2013
    Assignee: General Photonics Corporation
    Inventors: Xiaojun Chen, Xiaotian Steve Yao
  • Patent number: 8422882
    Abstract: Techniques, devices and applications are provided for monitoring a polarization mode dispersion (PMD) effect in an optical signal.
    Type: Grant
    Filed: January 23, 2009
    Date of Patent: April 16, 2013
    Assignee: General Photonics Corporation
    Inventor: Xiaotian Steve Yao
  • Publication number: 20130077151
    Abstract: Techniques and devices use cascaded optical polarization devices having modulated optical retardation to control optical polarization of light and can be configured for polarization scrambling. Uniform rate scrambling and quasi-uniform rate scrambling modes are provided in described devices and rate-additive designs based on multiple cascaded devices are also disclosed to achieve high-speed scrambling.
    Type: Application
    Filed: September 28, 2011
    Publication date: March 28, 2013
    Applicant: GENERAL PHOTONICS CORPORATION
    Inventors: Leon Yao, Xiaojun Chen
  • Patent number: 8345238
    Abstract: A device for measuring spectrum of light includes a differential group delay (DGD) device positioned to receive light under measurement and to produce output light with a DGD value representing a difference in the group delay between two orthogonal optical polarizations of the light under measurement. An optical detector is positioned to receive the output light from the DGD device to measure a state and a degree of polarization of the output light. A processing device receives and processes measurements of the state and the degree of polarization from the optical detector. A probe light source produces probe light. An optical sensor receives the probe light and interacts with the probe light at a resonance wavelength of the optical sensor. A processing unit processes the optical spectrum of the returned probe light to extract information on a parameter to change the resonance wavelength.
    Type: Grant
    Filed: January 9, 2009
    Date of Patent: January 1, 2013
    Assignee: General Photonics Corporation
    Inventor: Xiaotian Steve Yao
  • Patent number: 8164831
    Abstract: Techniques and devices for depolarizing light and producing a variable differential group delays in optical signals. In one implementation, an input optical beam is split into first and second beams with orthogonal polarizations. One or two optical reflectors are then used to cause the first and second optical beams to undergo different optical path lengths before they are recombined into a single output beam. An adjustment mechanism may used implemented to adjust the difference in the optical path lengths of the first and second beams to produce a variable DGD. When the depolarization of light is desired, the difference in the optical path lengths of the first and second beams is set to be greater than the coherence length of the input optical beam.
    Type: Grant
    Filed: May 19, 2009
    Date of Patent: April 24, 2012
    Assignee: General Photonics Corporation
    Inventors: X. Steve Yao, Jane Chen, Yongqiang Shi
  • Patent number: 8073326
    Abstract: Devices, systems and techniques for optical communication are provided based on polarization division multiplexing (PDM) to use an optical monitor channel at a distinct optical monitor wavelength to monitor optical polarization fluctuation and polarization mode dispersion during the transmission from the transmitter to the receiver to facilitate the effective demultiplexing of the two orthogonal signal channels at the receiver through automatic feedback control on a dynamic polarization controller and a polarization beam splitter.
    Type: Grant
    Filed: December 3, 2007
    Date of Patent: December 6, 2011
    Assignee: General Photonics Corporation
    Inventors: Lianshan Yan, Xiaotian Steve Yao
  • Publication number: 20110277552
    Abstract: Techniques and devices for measuring the distribution of polarization crosstalk in birefringence optical media including polarization maintaining fiber based on suppressing the number and magnitude of ghost interference peaks.
    Type: Application
    Filed: May 14, 2010
    Publication date: November 17, 2011
    Applicant: GENERAL PHOTONICS CORPORATION
    Inventors: Xiaojun Chen, Xiaotian Steve Yao