Patents by Inventor Niki Liu

Niki Liu 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).

  • Reducing temperature drift of an arrayed waveguide grating
    Patent number: 9285538
    Abstract: A wavelength selective device including an arrayed waveguide grating is disclosed. The wavelength selective device includes a MEMS mirror, which couples light from an input port to an elongate aperture of an input star coupler or slab of the arrayed waveguide grating. A controller tilts the MEMS mirror in response to a sensed temperature change of the arrayed waveguide grating, thereby lessening a sensitivity of the arrayed waveguide grating to the temperature change. The MEMS mirror can also be tilted to shift wavelengths of the wavelength channels of the arrayed waveguide grating by pre-defined amounts upon receiving a corresponding remote command.
    Type: Grant
    Filed: October 22, 2013
    Date of Patent: March 15, 2016
    Assignee: Lumentum Operations LLC
    Inventors: Jinxi Shen, Barthelemy Fondeur, Wenlin Jin, David J. Chapman, Niki Liu
  • Small form factor variable optical attenuator with cladding mode suppressing fiber
    Patent number: 8737778
    Abstract: The invention relates to an electro-static variable optical attenuator suitable for use in a small form factor pluggable module. A short cladding suppressing fiber, such as a double clad optical fiber, dissipates attenuated light coupled to the cladding to reduce modal interference in the output light, while also reducing PDL and WDL introduced by the off set attenuation mechanism.
    Type: Grant
    Filed: December 23, 2011
    Date of Patent: May 27, 2014
    Assignee: JDS Uniphase Corporation
    Inventors: Zhongjian Wang, Michael Ayliffe, Qinrong Yu, Niki Liu, Rongtang Fan
  • REDUCING TEMPERATURE DRIFT OF AN ARRAYED WAVEGUIDE GRATING
    Publication number: 20140112621
    Abstract: A wavelength selective device including an arrayed waveguide grating is disclosed. The wavelength selective device includes a MEMS mirror, which couples light from an input port to an elongate aperture of an input star coupler or slab of the arrayed waveguide grating. A controller tilts the MEMS mirror in response to a sensed temperature change of the arrayed waveguide grating, thereby lessening a sensitivity of the arrayed waveguide grating to the temperature change. The MEMS mirror can also be tilted to shift wavelengths of the wavelength channels of the arrayed waveguide grating by pre-defined amounts upon receiving a corresponding remote command.
    Type: Application
    Filed: October 22, 2013
    Publication date: April 24, 2014
    Inventors: Jinxi SHEN, Barthelemy Fondeur, Wenlin JIN, David J. CHAPMAN, Niki LIU
  • SMALL FORM FACTOR VARIABLE OPTICAL ATTENUATOR WITH CLADDING MODE SUPPRESSING FIBER
    Publication number: 20130163923
    Abstract: The invention relates to an electro-static variable optical attenuator suitable for use in a small form factor pluggable module. A short cladding suppressing fiber, such as a double clad optical fiber, dissipates attenuated light coupled to the cladding to reduce modal interference in the output light, while also reducing PDL and WDL introduced by the off set attenuation mechanism.
    Type: Application
    Filed: December 23, 2011
    Publication date: June 27, 2013
    Inventors: Zhongjian Wang, Michael Ayliffe, Qinrong Yu, Niki Liu, Rongtang Fan