Patents Examined by Dzung Tron
  • Apparatus and method for visualizing an automatic laser shutdown state in an optical transmission system
    Patent number: 6839516
    Abstract: An apparatus and method are disclosed for visualizing an automatic laser shutdown (ALS) state. An operator is informed of the ALS state by transmitting a visible light with weak power, to an optical fiber, that effuses from the cut position of the optical fiber. The operator recognizes the cut position of the optical fiber by comparing the power of the ALS visible light reflected from the cut surface of the optical fiber and that of the transmitting ALS visible light, and thus restores the cut optical fiber at the recognized position.
    Type: Grant
    Filed: August 28, 2001
    Date of Patent: January 4, 2005
    Assignee: LG Electronics Inc.
    Inventors: Byung Tak Lee, Jong Hoon Kim, Chang Bae Hyun