Patent ID: 6211985
Filing Date: 2001-04-03
Classification: H04B

Abstract:
A method for remotely determining the output power of each optical carrier for any repeater in an optical transmission system that comprises one or more repeaters, a first and second terminal, and optical paths over which are transmitted a plurality of optical carriers between the first and second terminals, said method comprising the steps of:(a) generating a first line monitor signal at the first terminal;(b) generating a second line terminal signal at the first terminal, wherein said second line terminal signal is delayed by a round trip delay from the first terminal to a first repeater;(c) transmitting the first line monitor signal on one of the optical paths;(d) generating a return line monitor signal at each of said repeaters in reponse to receiving the first line monitor signal;(e) transmitting the return line monitor signal on one of the optical paths;(f) receiving the return line monitor signal at the first terminal; and(g) demodulating the return line monitor signal with the second line monitor signal.