公开(公告)号：JPH09127563A

公开(公告)日：1997-05-16

申请号：JP24682496

申请日：1996-08-30

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： MATSUSHIMO ARUTEIGURIA ,  ERUNESUTO CHIYARAMETSURA

IPC: G02F1/35 ,  G02F2/00 ,  H01S3/067 ,  H04B10/02 ,  H04B10/17 ,  H04B10/18 ,  H04B10/29 ,  H04B10/16

Abstract: PROBLEM TO BE SOLVED: To improve spectrum conversion efficiency. SOLUTION: On the basis of a solving method known as spectrum inversion (or light phase conjugation), a spectrum is changed. This device 1 generally includes a medium like a dispersion shift optical fiber 4. A signal to be varied is sent in the optical fiber together with a pump signal of level which causes modulation unstableness in the fiber 4. A spectrum-inverted light signal is obtained as the output of the fiber 4 and varied in wavelength and its conversion efficiency is high. The spectrum of the pump signal is preferably expanded by, for example, a modulator 5 so as to evade induced Brillouin scatter.