×

Optical communication monitoring and control

  • US 5,510,917 A
  • Filed: 04/04/1995
  • Issued: 04/23/1996
  • Est. Priority Date: 12/18/1990
  • Status: Expired due to Fees
First Claim
Patent Images

1. An optical monitoring system for an optical communication route over which at least one set of communication signals of at least two distinct carrier optical wave lengths are simultaneously transmitted, each wave length carrying modulated information, said monitoring system comprising:

  • means for tapping a portion of said communication signal from the route after the signal has travelled over said route, the remainder of said signal being unaffected and proceeding as an optical signal,a demultiplexer for demultiplexing the tapped portion of said signal into its constituent optical wave lengths,an optical detector for detecting selected single demultiplexed optical wave length for providing a value representing the performance quality of the route for that wave length,evaluation means for comparing said value representing the performance quality to a standard representing the lower limit of acceptable performance quality for said wave length to evaluate the status condition of said route, andsignal means automatically responsive to said evaluation means to signal an unacceptable status condition of said route.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×