Penalty free biphase linecoding for pattern independent FSK coherent transmission systems

Author

Hooijmans, Pieter W. ; Tomesen, Mark T. ; Van De Grijp, Abram

Author_Institution

Philips Res. Lab., Eindhoven, Netherlands

Volume

8

Issue

3

fYear

1990

fDate

3/1/1990 12:00:00 AM

Firstpage

323

Lastpage

328

Abstract

Biphase coding is used to eliminate the unwanted influence of nonuniform laser characteristics in frequency-shift-keying (FSK) transmission systems. Compared to other (ternary) linecoding schemes, biphase has the advantage that it does not give a 3-dB sensitivity penalty when properly decoded in the receiver. This has been demonstrated in a 140-Mb/s 280-Mbaud transmission experiment. The receiver features a new type of reliable unambiguous clock extraction. Due to the compact IF spectrum, as compared with ternary linecoding schemes, biphase equipped FSK systems are especially suited for efficiently spaced coherent multichannel (CMC) systems. FSK heterodyne transmission experiments show a sensitivity ηP of -56.7 dBm for 2¹⁰-1 pseudorandom patterns, only 4.8 dB from the shot-noise limit

Keywords

encoding; frequency shift keying; light coherence; optical links; optical modulation; 140 Mbit/s; FSK heterodyne transmission; biphase linecoding; coherent multichannel; compact IF spectrum; decoded; frequency-shift-keying; nonuniform laser characteristics; optical modulation; pattern independent FSK coherent transmission systems; penalty free linecoding; pseudorandom patterns; receiver; sensitivity; shot-noise limit; subcarrier modulation; ternary linecoding schemes; unambiguous clock extraction; Ambient intelligence; Clocks; Decoding; Diode lasers; Distributed feedback devices; Frequency modulation; Frequency shift keying; Modulation coding; Optical signal processing; Optical transmitters;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.50729

Filename

50729