DCF with FBG for Dispersion Compensation in Optical Fiber Link at Various Bit Rates using Duobinary Modulation Format

Abstract

Dispersion is one of the very important parameters that effect on the performance of optical fiber communication systems. It causes pulse broadening, limiting of transmission distance and the number of channels on optical fiber link and low Bit rate. Dispersion compensation fiber (DCF) based on Fiber Bragg Grating (FBG) is widespread used in the dispersion compensation scheme. In this work, the proposed dispersion compensation fiber is included (prepost-symmetrical) schemes with Fiber Bragg Grating and duo-binary modulation format. These are at various bit rates (10 Gbit/s, 20 Gbit/s, 30 Gbit/s and 40 Gbit/s) and different input laser power from (0 dBm to 10 dBm) for 200 Km distance. Optisystem software version 10 is used to design simulation model. Q-factor and BER are two parameters which used to evaluate the performance analysis of the system, we concluded that, the symmetrical compensation techniques is better than others compensation schemes when the Q factor is 52.977 and bit rate is equal 0, these at 10 Gbit/s and 10 dBm transmitted power.

Evaluation of impairment mitigations for optical fiber communications using dispersion compensation techniques

“…It is recognized as one of the several types of chromatic dispersion. This dispersion is small at wavelengths about 1300 nm, as we'll see later [12]. The differing propagation constants of the modes cause them to move at varying speeds.…”