Patent ID: 6549697
Filing Date: 2003-04-15
Classification: H04B

Abstract:
A wavelength division multiplex optical signal regenerator adapted to be inserted between first upstream and second downstream optical fiber sections of a wavelength division multiplex fiber optic transmission system, comprising:a demultiplexer demultiplexing wavelength division multiplexed optical signals into N individual channels, where N is an integer greater than 1, and a multiplexer multiplexing optical signals at the output of said N individual channels into multiplexed optical signals; wherein each individual channel includes: a saturable absorber reshaping the optical signals of each channel, and means for reducing cross phase modulation; wherein the means for reducing cross phase modulation includes in each said channel a delay line downstream from the saturable absorber, and having a length such that &tgr;n=&tgr;nâ€²+&tgr;nâ€³, where: &tgr;n is a nonzero delay, between the (n+1)th channel and the nth channel, at the output of the delay line, &tgr;nâ€² is a delay, between the (n+1)th channel and the nth channel, at the input of the delay line, and &tgr;nâ€³ is a delay, between the (n+1)th channel and the nth channel, introduced by the delay line.