Performance Analysis of the Parallel Optical All-Pass Filter Equalizer for Chromatic Dispersion Compensation at 10 Gb/s

Optical fiber is capable of providing the solution to the need of high bandwidth communication. The main degradation to the optical signal integrity in single mode fibers (SMFs) is chromatic dispersion (CD). The effect of CD is pulse spreading which in turn leads to inter-symbol interference (ISI), thus increasing the bit error rate (BER) of the system. This paper presents a CD compensation technique that utilizes a parallel optical all pass filter (p-OAPF), where the design is based on the inverse phase response of the SMF. The p-OAPF is based on a class of all-pass filter. Simulation results of the proposed technique show an increase in the repeater-less length of a point-to-point optical communication system by 3 times with Gaussian pulses at 10 Gb/s and BER of 10^-9. A passive infinite impulse response filter structure is proposed for the implementation of the p-OAPF.