Transmission performance impairment due to degradation of optical spectrum in 1.55 Â¿m DFB laser

Author

Yamamoto, Seiichi ; Sakaguchi, H. ; Iwamoto, Yukihide

Author_Institution

KDD Research & Development Laboratories, Tokyo, Japan

Volume

22

Issue

8

fYear

1986

Firstpage

404

Lastpage

405

Abstract

The dynamic optical spectrum and optical transmission characteristics of a 1.55 Â¿m conventional distributed feedback (DFB) laser with a side mode were analysed. The laser used in the experiment came to operate in two modes although initially it had operated in single-mode. When this laser was directly modulated by setting the bias current around the threshold, the mode switching between a main mode and a side mode was observed to be similar to mode partitioning in Fabry-Perot (FP) lasers. The mode switching affects considerably the bit error rate performance of 113 km single-mode fibre transmission at 140 Mbit/s.

Keywords

III-V semiconductors; distributed feedback lasers; gallium arsenide; gallium compounds; indium compounds; laser modes; light transmission; optical communication equipment; optical modulation; semiconductor junction lasers; DFB laser; InGaAsP-InP laser; bias current; bit error rate performance; dynamic optical spectrum; laser modulation; mode switching; optical transmission characteristics; semiconductor laser; side mode; single-mode fibre transmission;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el:19860274

Filename

4256467