Spectral width reduction in multilongitudinal mode lasers by spatial loss profiling

Author

DeChiaro, Louis F.

Author_Institution

Bellcore, Red Bank, NJ, USA

Volume

9

Issue

8

fYear

1991

fDate

8/1/1991 12:00:00 AM

Firstpage

975

Lastpage

986

Abstract

Spatial loss profiling is experimentally and theoretically explored as a means of creating technologically useful reductions in the spectral width of multilongitudinal mode lasers. Lossy regions have been introduced at controlled locations along the optical axis of commercial laser diodes for the purpose of reducing the intensity of undesired longitudinal modes. Operation approaching single-mode characteristics with side-mode suppression better than 20 dB was experimentally achieved at 1.5X threshold current by the addition of three lossy regions. A rate equation model describes the effectiveness of spatial loss profiling to obtain quasi-single-mode operation and is used to explore its effects upon laser dynamics

Keywords

laser modes; laser theory; optical losses; semiconductor junction lasers; spectral line breadth; laser dynamics; lossy regions; multilongitudinal mode lasers; quasi-single-mode operation; rate equation model; side-mode suppression; single-mode characteristics; spatial loss profiling; spectral width reduction; threshold current; Distributed Bragg reflectors; Distributed feedback devices; Electrostatic discharge; High speed optical techniques; Laser modes; Optical losses; Power generation economics; Semiconductor lasers; Stress; Telecommunications;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.84163

Filename

84163