Equalization in coherent lightwave systems using microwave waveguides

Author

Winters, Jack H.

Author_Institution

AT & T Bell Lab., Holmdel, NJ, USA

Volume

7

Issue

5

fYear

1989

fDate

5/1/1989 12:00:00 AM

Firstpage

813

Lastpage

815

Abstract

The maximum bit rate/ distance product in recent single-frequency laser direct-detection lightwave system experiments has been limited by dispersion. An equalization technique, appropriate for coherent lightwave systems, that uses a microwave waveguide for overcoming the delay dispersion problem is considered. Results show that small low-loss waveguides can be used to greatly reduce dispersion. For example an 8 GHz bandwidth signal transmitted over 68 km of fiber can be equalized by a waveguide with a cross section of 6 mm×3 mm and a length of only 17 cm. With the waveguide equalizer, the dispersion-limited maximum bit rate/distance product for a standard fiber system can be increased to that of a dispersion-shifted fiber system at 1.55 μm, e.g., a 16-fold increase in maximum bit rate for 100 km transmission

Keywords

equalisers; optical dispersion; optical fibres; optical links; waveguides; 1.55 micron; 100 km; 68 km; 8 GHz; coherent lightwave systems; delay dispersion; dispersion; dispersion-shifted fiber system; equalization technique; microwave waveguides; single-frequency laser direct-detection lightwave system experiments; small low-loss waveguides; standard fiber system; Bandwidth; Bit rate; Chromatic dispersion; Equalizers; Frequency; Masers; Microwave theory and techniques; Optical waveguides; Propagation delay; Waveguide lasers;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.19119

Filename

19119