Comparison of performance between {2 × 2} and {3 × 3} optical phase diversity FSK receivers using delay-and-multiplying discriminator
Journal
Journal of Optical Communications
Journal Volume
14
Journal Issue
6
Pages
223-229
Date Issued
1993
Author(s)
Abstract
The performance {2 × 2} and {3 × 3} optical phase diversity FSK receivers using delay-and-multiplying discriminator is analyzed, respectively. Given data rate, frequency deviation, laser linewidth, relative intensity noise (RIN), and thermal noise, we can obtain the received signal power (sensitivity) with respect to a given local oscillator power to achieve a specified BER. Numerical results with system parameters given in [1] show that the optimal local oscillator (L.O.) power of a {2 × 2} receiver is — 6.5 dBm, —14 dBm, and —19 dBm for RIN = −150 dB/Hz, −135 dB/Hz, and −125 dB/Hz, respectively, when the thermal noise is 9 • 10-24A2/Hz. For a BER specified at 10 “9, the sensitivity of {3 × 3} receiver is degraded by no more than 1.8 dB as compared with the {2 × 2} receiver when L.O. power (PL) is lower than approximately —8 dBm, —15 dBm, and -20dBm for RIN=−150dB/Hz, −135dB/Hz, and −125 dB/Hz, respectively. For greater values of PL, the {3 × 3} receiver outperforms the {2 × 2} receiver increasingly with the increase of PL. © by Fachverlag Schiele & Schon 1993
SDGs
Type
journal article