Performance Analysis of Polarization-Insensitive Phase Diversity Optical FSK Receivers
Journal
Journal of Lightwave Technology
Journal Volume
8
Journal Issue
3
Pages
385-395
Date Issued
1990
Author(s)
Abstract
A polarization-insensitive phase-diversity optical frequency-shift-keying (FSK) receiver is proposed and its performance is also evaluated. The basic model and signal processing formulation are developed to describe the functions and features of this receiver. Two different approaches (one of which is an upper bound) are used to treat the mixed noise terms, and Gaussian approximation is employed to estimate the receiver performance in terms of the laser linewidth, the modulation index, and the filter bandwidth. The virtually polarization-insensitive property is also verified. As an example, numerical results are presented for a 150-Mbit/ s receiver, which show that the difference between the upper bound and the other approximation is about 2 to 3 dB. It is also shown that the receiver with small modulation index is less tolerant of the linewidth such that an error floor may appear. When the modulation index is large, the receiver can tolerate linewidths comparable with the bit rate. © 1990 IEEE
Type
journal article