NUMERICAL-ANALYSIS OF THE OPTIMAL LENGTH AND PROFILE OF A LINEARLY CHIRPED FIBER BRAGG GRATING FOR DISPERSION COMPENSATION

We propose a theoretical investigation of the length and coupling prof ile of a linearly chirped fiber Bragg grating for maximum dispersion c ompensation in a repeaterless optical communication system. The system consists of 100 km of standard optical fiber in which a 1550-nm signa l, directly modulated at 2.5 Gbits/s, is launched. We discuss the resu lts obtained with 6-, 4.33-, and 1-cm-long linearly chirped fiber Brag g gratings having Gaussian and uniform coupling profiles. We numerical ly show that a 4.33-cm-long chirped fiber Bragg grating having a unifo rm coupling profile is capable of compensating efficiently for the dis persion of our optical communication system.