Patents by Inventor Qingdong Quo

Qingdong Quo 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).

  • Optical circulator
    Patent number: 6757451
    Abstract: An optical circulator with a first, second, third, and fourth port. The second and third port are disposed to receive polarized light entering the circulator as unpolarized light from the first port. The fourth port is disposed to receive unpolarized light entering the circulator as polarized light from the second and third port. The circulator comprises a beam-splitting and -combining element for separating and combining mutually orthogonal polarizations and a non-reciprocal polarization rotator. The circulator can be used to furnish light of a desired predetermined polarization for polarization-dependent devices.
    Type: Grant
    Filed: February 25, 2002
    Date of Patent: June 29, 2004
    Assignee: JDS Uniphase Corporation
    Inventors: Kok-Wai Chang, Kuochou Tai, Jyehong Chen, Qingdong Quo
  • Optical circulator
    Publication number: 20020168128
    Abstract: An optical circulator with a first, second, third, and fourth port. The second and third port are disposed to receive polarized light entering the circulator as unpolarized light from the first port. The fourth port is disposed to receive unpolarized light entering the circulator as polarized light from the second and third port. The circulator comprises a beam-splitting and -combining element for separating and combining mutually orthogonal polarizations and a non-reciprocal polarization rotator. The circulator can be used to furnish light of a desired predetermined polarization for polarization-dependent devices.
    Type: Application
    Filed: February 25, 2002
    Publication date: November 14, 2002
    Applicant: JDS Uniphase Corporation
    Inventors: Kok-Wai Chang, Kuochou Tai, Jyehong Chen, Qingdong Quo