The onset of coherence collapse in DBR lasers

Author

Woodward, S.L. ; Koch, T.L. ; Koren, U.

Author_Institution

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

Volume

2

Issue

6

fYear

1990

fDate

6/1/1990 12:00:00 AM

Firstpage

391

Lastpage

394

Abstract

A study of the dependence of the onset of coherence collapse on laser output power is discussed. Three-section multiquantum-well-distributed-Bragg-reflector (MQW-DBR) lasers were used. The fraction of light reflected back into the lasing mode was varied, and the point at which the transition to coherence collapse occurred was measured. This feedback level varies approximately linearly with laser output power. For these lasers, when the output power is 1 mW, the transition to coherence collapse begins when the optical feedback into the lasing mode is below -40 dBm; when the feedback power is -35 dBm, the laser line is completely collapsed.<>

Keywords

distributed Bragg reflector lasers; feedback; laser beams; laser modes; light coherence; light reflection; semiconductor junction lasers; semiconductor quantum wells; 1 mW; DBR lasers; coherence collapse; coherence collapse transition; feedback level; feedback power; laser line; laser output power; lasing mode; multiquantum-well-distributed-Bragg-reflector; reflected light fraction; Coherence; Distributed Bragg reflectors; Laser feedback; Laser modes; Laser transitions; Optical feedback; Output feedback; Power generation; Power lasers; Quantum well devices;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.56596

Filename

56596