Chromatic Dispersion Compensation Using an Optical All Pass Filter for a 10 Gb/s Optical Communication System at 160 km

This paper proposes a promising technique to compensate chromatic dispersion (CD) by using an optical all pass filter (OAPF) as an optical equaliser. The phase response of OAPF will be designed to cancel the phase delay of single mode fibre (SMF) which is the main cause of CD. The simulation of the mathematical model of the optical communication system at 10 Gb/s employing the proposed OAPF will be presented. A minimum mean square error (MMSE) technique was used to optimise the equaliser and the simulation results show that a pulse, after travelling 160 km of SMF, is fully compensated to its original pulse spread at full width half maximum (FWHM). The eye diagram also show an eye opening improvement of 68% compared to a fully opened eye and the dispersion penalty is reduced 32 dB.