Analysis of bit error rate of an optical clock extraction system based on self pulsating laser diodes

Abstract

A theoretical analysis of the bit error rate (BER) in an optical clock extraction system using compact disk self-pulsating laser diodes (SPLDs) is performed. The dependence of the BER on the power of the incoming received data signal and on the detuning between the applied and free running SPLD pulse repetition frequencies is analysed. For a fixed detuning an optimum value of the input signal power at which the system BER is minimum is obtained. This minimum is due to the appearance of oscillations of the relative phase between the input and output signals at high values of the input power. An optimum value of the detuning at which the system BER is minimized is then identified. The influence of fluctuations of the input signal and data encoding on the system BER is also analysed.