Patents by Inventor Gary W. Pearson

Gary W. Pearson 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).

  • Polarization independent all-fiber optical circulator
    Patent number: 5400418
    Abstract: There is provided an optical circulator (16) for bidirectional communication on a fiber optic communication transmission system. Polarization preserving single-mode fiber lengths (26), (28) connect all-fiber polarization splitter (18) with the Faraday single-mode fiber lengths (22), (24). Polarization preserving single-mode fiber lengths (30), (32) connect the opposite ends of Faraday single-mode fiber lengths (22), (24) with all-fiber polarization splitter (20). A communication transmitter is connected to splitter (18) at port 1, and a communication receiver is connected to splitter (18) at port 3. A fiber optic communication link (50) is connected to splitter (20) at port 2. The components of optical circulator (16) cooperate such that light transmitted into port 1 exits from port 2, and light transmitted into port 2 exits from port 3.
    Type: Grant
    Filed: December 4, 1992
    Date of Patent: March 21, 1995
    Assignees: Williams Telecommunication Group, Inc., Board of Regents for Oklahoma State University
    Inventors: Gary W. Pearson, Jerzy S. Krasinski, Philip E. Baker
  • Polarization independent low cross-talk optical circulator
    Patent number: 5319483
    Abstract: There is provided an optical circulator (16) for bidirectional communication on a fiber optic communication transmission system. A reflection rhomb (17) includes a polarizing thin film (26) and an inclined, internally reflecting end surface (22). A first birefringent crystal (28) is disposed against the reflection rhomb (17). A quartz rotator (34) is disposed against the opposite side of the first birefringent crystal (28). A Faraday rotator (40) is disposed against the opposite side of the quartz rotator (34). A second birefringent crystal (46) is disposed against the opposite side of the Faraday rotator (40). The components of optical circulator (16) cooperate such that light transmitted into port 1 exits from port 2, and light transmitted into port 2 exits from port 3.
    Type: Grant
    Filed: December 4, 1992
    Date of Patent: June 7, 1994
    Assignees: Williams Telecommunications Group, Inc., Bd. of Regents, Oklahoma State University
    Inventors: Jerzy S. Krasinski, Gary W. Pearson, Phillip E. Baker