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1. (WO2001006682) DISPERSION COMPENSATION SYSTEM

Pub. No.:    WO/2001/006682    International Application No.:    PCT/JP2000/004847
Publication Date: Fri Jan 26 00:59:59 CET 2001 International Filing Date: Thu Jul 20 01:59:59 CEST 2000
IPC: G02B 6/34
H04B 10/2513
H04B 10/291
Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD.

Inventors: TSUKITANI, Masao

SASAOKA, Eisuke

OKUNO, Toshiaki

Title: DISPERSION COMPENSATION SYSTEM
Abstract:
A demultiplexer in a dispersion compensation system of the invention separates an optical signal in a 1520-1620 nm band propagating through a first common transmission path into two bands, i.e., C band (1520-1565 nm) and L band (1565-162O nm). The demultiplexer then sends the optical signal in the C band and the optical signal in the L band to a first branch path and a second branch path, respectively. A first dispersion compensation device is provided in the first common transmission path to compensate for dispersion in the C and L bands. A second dispersion compensation device is provided in the second branch path to compensate for dispersion in the L band if the dispersion compensation by the first dispersion compensation device is insufficient. It is thus possible to sufficiently compensate for the dispersion of an optical transmission path in a wide signal band.