Patents by Inventor Lixin (Lawrence) Wang

Lixin (Lawrence) Wang 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).

  • Optimization of wavelength selective switch using phase control of liquid crystal spatial light modulator
    Patent number: 11016441
    Abstract: A two-step optimization process is utilized to define an optimal phase profile for a LCoS spatial light modulator. The two-step optimization process first utilizes a nonlinear constrained optimization (NCO) program to determine the specific parameters required to obtain an optimal phase profile (hologram), where the “optimal phase profile” is typically defined as that profile which achieves maximum diffraction efficiency for optical switching. Following this first step, phase scaling (and perhaps an adjustment in the number of pixels per period) is employed to slightly modify the values of the optimal phase profile to effectively suppress crosstalk peaks. If any orders still exhibit an unacceptable level of crosstalk, these orders are then subtracted from the phase profile to create the final design.
    Type: Grant
    Filed: February 18, 2019
    Date of Patent: May 25, 2021
    Assignee: II-VI Delaware, Inc.
    Inventors: Kun Gao, Jack R. Kelly, Helen Chen, Guomin Jiang, Xinran Wang, Lixin (Lawrence) Wang, Qingyu (Tom) Li, Haiji J. Yuan
  • Optimization Of Wavelength Selective Switch Using Phase Control Of Liquid Crystal Spatial Light Modulator
    Publication number: 20200264558
    Abstract: A two-step optimization process is utilized to define an optimal phase profile for a LCoS spatial light modulator. The two-step optimization process first utilizes a nonlinear constrained optimization (NCO) program to determine the specific parameters required to obtain an optimal phase profile (hologram), where the “optimal phase profile” is typically defined as that profile which achieves maximum diffraction efficiency for optical switching. Following this first step, phase scaling (and perhaps an adjustment in the number of pixels per period) is employed to slightly modify the values of the optimal phase profile to effectively suppress crosstalk peaks. If any orders still exhibit an unacceptable level of crosstalk, these orders are then subtracted from the phase profile to create the final design.
    Type: Application
    Filed: February 18, 2019
    Publication date: August 20, 2020
    Applicant: II-VI Delaware, Inc.
    Inventors: Kun Gao, Jack R. Kelly, Helen Chen, Guomin Jiang, Xinran Wang, Lixin (Lawrence) Wang, Qingyu (Tom) Li, Haiji J. Yuan