Patent ID: 7133191
Filing Date: 2006-11-07
Classification: H04B

Abstract:
1. A method for processing a signal that is transmitted over an optical wavelength range encompassed by a channel of an optical communications system, said method comprising the steps of 1) coupling a first and second portion of said signal into a device wherein said first portion traverses a first optical wavepath of said device and said second portion traverses a second wavepath of said device, and 2) combining said first portion and second portion after said traversing of said first and second wavepath respectively characterized in that a first frequency-versus-phase dependency is imposed on said first portion by said first wavepath and a second frequency-versus-phase dependency is imposed on said second portion by said second wavepath such that said dependencies induce a signal group delay on said signal portions having a magnitude exceeding 200 BR −2 ps/GHz for at least one wavelength within said channel of said signal where BR is the signal bit rate divided by 10 9 symbols/sec and wherein said first frequency-versus-phase dependency and said second frequency-versus-phase dependency are similar to and inverted from each other.