DFB laser with nonuniform coupling coefficient realized by double-layer buried grating

Author

Nilsson, S. ; Kjellberg, T. ; Klinga, T. ; Wallin, Johan ; Streubel, K. ; Schatz, Richard

Author_Institution

Swedish Inst. of Microelectron., Kista, Sweden

Volume

5

Issue

10

fYear

1993

Firstpage

1128

Lastpage

1131

Abstract

A technique for the realization of a nonuniform grating coupling coefficient kappa , and its implementation in distributed-feedback (DFB) lasers is presented. This technique, which is an extension of the buried-grating concept, offers precise control of the coupling coefficient and enables a kappa -ratio greater than 10. DFB lasers with an asymmetric kappa -variation have been fabricated using this method. A front-to-rear facet output power ratio close to five was obtained, qualitatively in agreement with simulations.<>

Keywords

diffraction gratings; distributed feedback lasers; optical couplers; semiconductor lasers; DFB laser; asymmetric kappa variation; distributed-feedback; double-layer buried grating; front-to-rear facet output power ratio; grating coupling coefficient; laser diodes; nonuniform coupling coefficient; Diode lasers; Electrons; Gratings; Laser modes; Optical coupling; Quantum well lasers; Semiconductor lasers; Superlattices; Surface reconstruction; Waveguide lasers;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.248403

Filename

248403