Patents Examined by Dmar Rojas
  • Miniature variable attenuator
    Patent number: 6606446
    Abstract: An improved optic attenuator controllably filters an optical signal after the signal has been expanded and collimated. The optical signals are preferably expanded and refocused by a single GRIN lens, the signal passing through a variable filter between the GRIN lens and a reflector, and again between the reflector and the GRIN lens. Both the input and output fibers can be held within a single sleeve in alignment with the GRIN lens. The amount of attenuation can be indicated by a potentiometer.
    Type: Grant
    Filed: June 30, 1997
    Date of Patent: August 12, 2003
    Assignee: JDS Uniphase Corporation
    Inventors: Ronggui Shen, Jingyu Xu, Jing-Jong Pan