Analysis of external optical feedback on distributed-feedback semiconductor lasers above threshold

Author

Wu, Huoy-Jong ; Chang, Hung-Chun

Author_Institution

Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan

Volume

5

Issue

10

fYear

1993

Firstpage

1168

Lastpage

1170

Abstract

An analysis of external optical feedback based on distributed-feedback (DFB) semiconductor lasers above threshold is presented. It is based on a numerical model taking into account the longitudinal spatial hole burning (SHB) effect, which has been recently known to be an important phenomenon for DFB lasers above threshold. Numerical results for a typical index-coupled quarter-wave-shifted (QWS) DFB laser with a moderate coupling coefficient ( kappa L=3) are given. It was found that the SHB effect can affect the sensitivity to feedback for DFB lasers above threshold.<>

Keywords

distributed feedback lasers; feedback; laser theory; optical hole burning; semiconductor lasers; sensitivity; DFB lasers; above threshold; distributed-feedback semiconductor lasers; external optical feedback; index-coupled; longitudinal spatial hole burning; moderate coupling coefficient; numerical model; quarter-wave-shifted; sensitivity; Charge carrier density; Distributed feedback devices; Equations; Fiber lasers; Laser feedback; Laser modes; Laser theory; Optical feedback; Refractive index; Semiconductor lasers;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.248416

Filename

248416