A NEW METHOD TO CALCULATE BER FLOOR CAUSED BY LASER PHASE NOISE IN WEAKLY COHERENT OPTICAL TRANSMISSION SYSTEMS USING ALLAN VARIANCE

摘要

A new approach using Allan Variance to calculate the BER floor caused by laser phase noise in weakly coherent optical transmission systems has been put forward for the first time. The relation between the BER floor and IF filter bandwidth has been discussed. THis new method features clear physical picture and simpUcity of analysis. The comparison between the calcutated results and the experimental clam has been made and a good agreement is obtained.