The effect of crosstalk and phase noise in multichannel coherent optical DPSK systems with tight IF filtering

Author

Jacobsen, Gunnar ; Garrett, Ian

Author_Institution

TFL Telecommun. Res. Lab., Horsholm, Denmark

Volume

9

Issue

11

fYear

1991

fDate

11/1/1991 12:00:00 AM

Firstpage

1609

Lastpage

1617

Abstract

Results for two-channel differential-phase-shift-keying (DPSK) systems using finite integrator and raised cosine response IF filters are presented. The sensitivity of an optical receiver in a two-channel DPSK system is studied. The results are compared with previous work in the limit of no phase noise and it is shown that the agreement is good. The penalty due to crosstalk for different linewidths and filter shapes is computed, and it is shown that the minimum channel spacing is a few bit rates for an ideal integrator IF filter and is larger for an IF filter with a raised cosine impulse response. The penalty is increased somewhat by phase noise

Keywords

band-pass filters; crosstalk; optical filters; optical links; phase shift keying; random noise; bandpass filter; crosstalk; finite integrator filters; minimum channel spacing; multichannel coherent optical DPSK systems; optical receiver; phase noise; raised cosine impulse response; raised cosine response IF filters; sensitivity; tight IF filtering; two-channel differential-phase-shift-keying; Channel spacing; Differential quadrature phase shift keying; Filtering; Optical crosstalk; Optical filters; Optical mixing; Optical noise; Optical receivers; Optical sensors; Phase noise;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.97653

Filename

97653