Impact of finite frequency deviation on the performance of dual-filter heterodyne FSK lightwave systems

Author

Tonguz, Ozan K. ; Tanrikulu, M. Okan ; Kazovsky, Leonid G.

Author_Institution

Dept. of Electr. & Comput. Eng., State University of New York, Buffalo, NY, USA

Volume

11

Issue

2

fYear

1993

fDate

2/1/1993 12:00:00 AM

Firstpage

316

Lastpage

330

Abstract

A detailed theoretical analysis is given of the impact of finite frequency deviation on the sensitivity of dual-filter heterodyne frequency-shift-keying (FSK) lightwave systems. The analysis provides closed-form signal-to-noise ratio (SNR) results for estimating the bit-error-ratio (BER) performance of the system. These closed-form results provide an insight into the impact of finite frequency deviation 2Δf_d, laser linewidth Δν, bit rate R_b, and IF filter bandwidths on the system performance. Simulation results indicate that the accuracy of the approximate theory presented is within 1 dB for linewidths up to 22% when BER=10^-9. It is shown that there is a well-defined relationship between the choice of frequency deviation and the tolerable amount of laser phase noise. The sensitivity degradation can be very severe for a fixed linewidth as the frequency deviation gets smaller

Keywords

demodulation; frequency shift keying; optical links; optical modulation; optical receivers; semiconductor device noise; sensitivity; spectral line breadth; IF filter bandwidths; approximate theory; bit-error-ratio; closed-form; dual-filter heterodyne FSK lightwave systems; finite frequency deviation; fixed linewidth; frequency-shift-keying; laser diodes; laser linewidth; laser phase noise; optical receivers; sensitivity; sensitivity degradation; signal-to-noise ratio; system performance; Bandwidth; Bit error rate; Bit rate; Filters; Frequency shift keying; Laser theory; Performance analysis; Signal analysis; Signal to noise ratio; System performance;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.212544

Filename

212544