Compensation of Dispersion in Optical Communication Systems using DCF and FBG Methods

Abstract: Dispersion is a property of optical fiber, which causes spreading of light within the core of the optical fiber due to propagation delay spread of different spectral components of the transmitted signal which leads to pulse broadening of transmitted signal. Since the optical fibers will transfer the information at very high speeds, due to pulse broadening the Bit error rate (BER) is high and quality of the received signal at the receiver is very poor. In order to receive the signal with better quality that means with low Bit error rates (BER) we need to compensate the Dispersion property of the optical fibers. In this paper, Dispersion Compensation Fiber (DCF), Fiber Bragg Grating (FBG) methods are used to compensate the dispersion in optical fibers. Pre, post and symmetric compensation techniques are the three different techniques in DCF method of dispersion compensation, all and these techniques are analyzed by using Dispersion Compensation Fiber (DCF) and normal Single Mode Fiber (SMF).

Keywords: Dispersion, Dispersion Compensation, Dispersion Compensation Fiber (DCF), Fiber Bragg Grating (FBG).