Side-mode suppression mechanism of gain-coupled DFB lasers with periodically etched quantum wells

Author

Makino, T.

Author_Institution

Bell-Northern Res. Ltd., Ottawa, Ont., Canada

Volume

8

Issue

5

fYear

1996

fDate

5/1/1996 12:00:00 AM

Firstpage

602

Lastpage

604

Abstract

The effect of the gain and index coupling on the side-mode suppression ratio (SMSR) is studied for gain-coupled DFB lasers with periodically etched quantum wells. An accurate expression for the SMSR based on the amplified spontaneous emission model is used with the local-normal-mode transfer-matrix method. The mechanism for the strong single-mode stability of the gain-coupled DFB lasers is explained by the difference between the effective gain and loss of the Bloch waves in the grating structures. This new view clearly shows the advantage of the gain-coupled DFB lasers in terms of single-mode stability.

Keywords

diffraction gratings; distributed feedback lasers; laser modes; laser stability; quantum well lasers; superradiance; Bloch waves; accurate expression; amplified spontaneous emission model; effective gain; gain-coupled DFB lasers; grating structures; local-normal-mode transfer-matrix method; periodically etched quantum wells; side-mode suppression mechanism; strong single-mode stability; Argon; Etching; Frequency conversion; Gratings; Laser modes; Laser stability; Power generation; Quantum well lasers; Spontaneous emission; Temperature distribution;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.491552

Filename

491552