Stability of the longitudinal mode in λ/4-shifted InGaAsP/InP DFB lasers

Author

Okai, Makoto ; Tsuji, Shinji ; Chinone, Naoki

Author_Institution

Hitachi Ltd., Tokyo, Japan

Volume

25

Issue

6

fYear

1989

fDate

6/1/1989 12:00:00 AM

Firstpage

1314

Lastpage

1319

Abstract

Factors causing the mode stability of λ/4-shifted distributed-feedback (DFB) lasers, spatial hole burning along the laser axis and residual reflectivity of the facets of laser cavity, are studied. It is experimentally and theoretically confirmed that the spatial hole burning increases the corrugation phase shift from λ/4 (π) to 3λ/8 (1.5 π) as the driving current increases in lasers whose coupling constant and cavity-length product kL is 2.0. This hole-burning effect requires the reflectivity of facets to be reduced below 0.2% to get a high reproducibility of lasers oscillating at a stable single mode up to high output powers

Keywords

III-V semiconductors; distributed feedback lasers; gallium arsenide; gallium compounds; indium compounds; laser modes; optical hole burning; reflectivity; semiconductor junction lasers; InGaAsP-InP; corrugation phase shift; coupling constant; driving current; lambda/4 shifted DFB laser; laser cavity facets; longitudinal mode stability; residual reflectivity; spatial hole burning; Corrugated surfaces; Distributed feedback devices; Indium phosphide; Laser feedback; Laser modes; Laser stability; Laser theory; Optical coupling; Power generation; Power lasers; Reflectivity; Reproducibility of results; Substrates;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/3.29262

Filename

29262