US 20050265725A1
(19) United States
(12) Patent Application Publication (io) Pub. No.: US 2005/0265725 Al
Okano et al. (43) Pub. Date: Dec. 1,2005
(75) Inventors: Satoru Okano, Yokohama (JP);
Motoyoshi Sekiya, Kawasaki (JP);
Kaori Odate, Tokyo (JP); Tatsuru
Iwaoka, Yokohama (JP)
Correspondence Address:
STAAS & HALSEY LLP
SUITE 700
1201 NEW YORK AVENUE, N.W.
WASHINGTON, DC 20005 (US)
(73) Assignee: Fujitsu Limited, Kawasaki (JP)
(21) Appl. No.: 10/954,310
(22) Filed: Oct. 1, 2004
(30) Foreign Application Priority Data
May 28, 2004 (JP) 2004-159668
(57) ABSTRACT
In a long-distance and large-capacity optical transmission system, a dispersion compensating device showing a wavelength-dependency ol dispersion characteristic is provided in a transmission line which makes a connection between a transmission terminal node and a reception terminal node. The reception terminal node acquires a dispersion quantity relative to single-wavelength light outputted from a wavelength-variable transmitter which is provided in the transmission terminal node for outputting single-wavelength light, and transmits wavelength control information corresponding to the acquired dispersion quantity to the transmission terminal node. The transmission terminal node varies the wavelength of the transmitter on the basis of the transmitted wavelength control information. This enables acquiring an optimum dispersion compensation quantity with a simple configuration and optimizing a dispersion compensation quantity for each channel at the transmission of wavelength-multiplexed light.
