R. Corvaja et L. Tomba, PERFORMANCE EVALUATION OF ASK MULTICHANNEL COHERENT OPTICAL-SYSTEMS, European transactions on telecommunications and related technologies, 4(6), 1993, pp. 615-621
In this work we evaluate the impairments due to laser phase noise in m
ultichannel coherent optical systems using a heterodyne ASK modulation
scheme. The effects of crosstalk due to a finite value of the channel
spacing are considered in a system employing a frequency division mul
tiplexing technique. The phase noise and the frequency spacing between
adjacent channels are the fundamental parameters which determine the
design criteria (e.g. the bandwidth of the intermediate frequency filt
ers) and the performance of the receiver. The accurate statistical cha
racterization of the filtered phase noise and of the crosstalk is the
key to get accurate results: to this aim the exact moments of the rand
om processes related to the phase noise and to the crosstalk interfere
nce are used together with a Gaussian Quadrature Rule for the evaluati
on of the error probability.