Patent ID: 6018404
Filing Date: 2000-01-25
Classification: H01S,H04B

Abstract:
A bidirectional telecommunication method comprising the steps of:generating a first plurality of optical signals at a first group of wavelengths in a first transmitting station;generating a second plurality of optical signals at a second group of wavelengths in a second transmitting station;introducing said first and second plurality of signals into the opposite ends of an optical fiber of a telecommunication line;amplifying said first and second plurality of signals in an optical amplifier coupled along the line through optical connectors, wherein the amplifying comprises filtering by wavelength selective couplers said first and second plurality of signals so that any optical loop including the amplifier has at any wavelength an attenuation greater than the maximum amplifier gain; andreceiving said first and second plurality of signals at respective first and second reception stations at the opposite end of said optical fiber relative to said first and second transmitting stations.