Effect of external reflectors on radiation profile of grating coupled surface emitting lasers

Author

Yu, S.F. ; Zhang, L.M. ; Plumb, R.G.S. ; Carroll, J.E.

Author_Institution

Dept. of Eng., Cambridge Univ., UK

Volume

140

Issue

1

fYear

1993

fDate

2/1/1993 12:00:00 AM

Firstpage

30

Lastpage

38

Abstract

Grating coupled surface emitting distributed feedback lasers are analysed by the authors´ recently developed model. The model takes into account spontaneous emission, the longitudinal variation of carrier concentration and that of photon density, calculated by a self-consistent technique. The emission spectrum and near and far field radiation patterns are determined as a function of the injection current and external optical feedback. It is found that a single lobed far field radiation pattern is favoured by asymmetric coating of the facets. In addition, the phase margin to achieve a single lobed radiation profile can be increased by increasing the amplitude of the reflection

Keywords

diffraction gratings; distributed feedback lasers; laser theory; optical couplers; semiconductor device models; semiconductor lasers; asymmetric coating; carrier concentration; diode laser model; distributed feedback lasers; emission spectrum; external optical feedback; external reflectors; facet coating; grating coupled surface emitting lasers; injection current; laser accessories; longitudinal variation; near field radiation patterns; photon density; radiation profile; reflection amplitude; reflectivity; self-consistent technique; single lobed far field radiation pattern; single lobed radiation profile; spontaneous emission;

fLanguage

English

Journal_Title

Optoelectronics, IEE Proceedings J

Publisher

iet

ISSN

0267-3932

Type

jour

Filename

197392