Sensitivity of Optically Preamplified DPSK Receivers with Fabry-Perot Filters

摘要

The error-rate performance of a DPSK lightwave receiver having an opticalamplifier followed by a Fabry-Perot filter and delay-line demodulator is analyzed. Receivers with sampling and with integrate and dump threshold comparison are compared to the well-known result for a matched optical filter. The Fabry-Perot filter decreases the sensitivity at 1O to the minus 9th power error-rate from 20 to 24.5 photons/b with optimum optical filter bandwidth and postdetection integration time.