公开(公告)号：CA2247610C

公开(公告)日：2003-04-15

申请号：CA2247610

申请日：1998-09-17

Applicant: LUCENT TECHNOLOGIES INC

Inventor： BOIVIN LUC ,  FELDMAN ROBERT D ,  NUSS MARTIN C

IPC: H04B10/24 ,  H04B10/02 ,  H04B10/17 ,  H04B10/18 ,  H04B10/26 ,  H04B10/29

Abstract: Low-noise, bidirectional communications in a fiber optic cable is achieved by coupling a first end of the cable to a spectrally-sliced optical power source. A second end of the cable is coupled to an optical detector having a detector bandwidth, such that the bandwidth of the optical power source is greater than the detector bandwidth. When the bandwidth of the optical power source is large compared to the bandwidth of the detector, the beat frequencies resulting from coherent Rayleigh noise fall outside the bandwidth of the detector and are not detected.