Basic analysis of AR-coated, partly gain-coupled DFB lasers: the standing wave effect

Author

David, Klaus ; Buus, Jens ; Baets, Roel G.

Author_Institution

Gent Univ., IMEC, Belgium

Volume

28

Issue

2

fYear

1992

fDate

2/1/1992 12:00:00 AM

Firstpage

427

Lastpage

434

Abstract

A theoretical analysis of distributed feedback (DFB) lasers with mixed gain and index coupling (partly gain-coupled DFB) is given for perfect antireflection (AR) coatings. Analytical expressions for the threshold gain, facet loss, and the relative depth of the standing wave pattern are derived. At the same time the importance of the standing wave effect and its consideration by coupled mode equations is shown. For purely gain-coupled DFB lasers, simple expressions for the effective linewidth enhancement factor and the longitudinal spontaneous emission factor are derived. In addition, various approximations describing the performance of purely gain-coupled DFB lasers are given

Keywords

antireflection coatings; distributed feedback lasers; laser modes; laser theory; optical films; semiconductor junction lasers; spectral line breadth; AR-coated; coupled mode equations; diode lasers; distributed feedback; effective linewidth enhancement factor; facet loss; index coupling; longitudinal spontaneous emission factor; mixed gain; partly gain-coupled DFB lasers; perfect antireflection coatings; relative depth; standing wave effect; standing wave pattern; threshold gain; Coatings; Equations; Laser feedback; Laser modes; Laser theory; Optical coupling; Optical feedback; Optical reflection; Pattern analysis; Spontaneous emission;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/3.123269

Filename

123269