Patents Represented by Attorney, Agent or Law Firm Kevin E. Green
  • Variable optical attenuator
    Patent number: 6374032
    Abstract: A variable optical attenuator is described. A special profile blocker is rotated across a large angel (e.g., 180° to 360°) to provide a variable amount of attenuation. In one embodiment, the special profile blocker is an eccentrically driven wheel. The special profile blocker is driven by a stepper motor via a gear assembly. In one embodiment, the variable optical attenuator includes a beam splitter for the input and/or the output signal for monitoring of signal strength and/or feedback control of the attenuator.
    Type: Grant
    Filed: April 22, 1999
    Date of Patent: April 16, 2002
    Assignee: JDS Uniphase Corporation
    Inventors: Hongwei Mao, Jian Chen, Brian Liu
  • Polymeric optical waveguide doped with a lanthanide-sensitizer complex
    Patent number: 6337944
    Abstract: The invention relates to a polymeric waveguide comprising a lanthanide ion-sensitizer complex, characterized in that the lanthanide ion is preferably neodymium(III) ion (Nd3+), ytterbium(III) ion (Yb3+), or erbium(III) ion (Er3+), and the sensitizer absorbs in the 400-1200 nm region, and preferably in the 600-1000 nm region. The invention also relates to an optical device comprising the same.
    Type: Grant
    Filed: August 1, 1999
    Date of Patent: January 8, 2002
    Assignee: JDS Uniphase Photonics C.V.
    Inventor: Johannes Willem Hofstraat