OPTICAL SIGNAL TRANSMISSION METHOD TO CORRECT COLOR SCATTERING THROUGH CHIRP OPTICAL FIBER GRATING AND OPTICAL COMMUNICATION SYSTEM USING THIS METHOD

摘要

PROBLEM TO BE SOLVED: To provide an optical signal transmission method where color scattering of an optical fiber transmission line is corrected and to provide a communication system using this method. SOLUTION: In the communication system with an optical fiber transmission line 3, at least one correction module 4(4A...4N) based on chirp optical fiber grating corrects color scattering caused by the optical fiber 3. The chirp optical fiber grating has a group delay characteristic () that represents ripples around a nominal linear profile as a function of an optical signal frequency. In order to minimize the effect of the ripples, correction is conducted so that an operating point is placed in a limited gradation area of a curve denoting deterioration of system performance due to color scattering with respect to a given fiber length 3.