Patent ID: 6574404
Filing Date: 2003-06-03
Classification: H04B,H04J

Abstract:
A chromatic dispersion compensating module, which compensates for a chromatic dispersion of an optical fiber transmission line, comprising:a chromatic dispersion compensator having, at a predetermined wavelength, a chromatic dispersion with a sign opposite to that of the chromatic dispersion of said optical fiber transmission line, and a chromatic dispersion slope with a sign opposite to that of the chromatic dispersion slope of said optical fiber transmission line; and a temperature controller that controls a temperature of said chromatic dispersion compensator in such a manner that the chromatic dispersion of said chromatic dispersion compensator is set at a desired value, wherein said chromatic dispersion compensator comprises one or more of dispersion compensating optical fibers, and wherein, at a predetermined wavelength, the absolute value of the chromatic dispersion fluctuation per unit temperature of said dispersion compensating optical fibers is larger than the absolute value of the chromatic dispersion fluctuation per unit temperature of said optical fiber transmission line.