Optimization of grating structures in complex-coupled MQW DFB lasers with absorptive gratings

Author

Sung-Chan Cho ; Dong-Chan Rhee ; Boo-Gyoun Kim

Author_Institution

Dept. of Electron. Eng., SoongSil Univ., Seoul, South Korea

Volume

3

fYear

1999

fDate

Aug. 30 1999-Sept. 3 1999

Firstpage

914

Abstract

There is a trade-off between the low threshold gain and large fabrication tolerance. Among the grating structures studied, the double grating structure consisting of the absorptive grating on the index grating has the largest fabrication tolerance of the threshold gain and the coupling strength. The fabrication tolerance of coupling ratio is very large for all grating structures studied.

Keywords

diffraction gratings; distributed feedback lasers; light absorption; optical fabrication; optimisation; quantum well lasers; absorptive grating; complex-coupled MQW DFB lasers; coupling ratio; coupling strength; double grating structure; fabrication tolerance; grating structure optimisation; grating structures; index grating; large fabrication tolerance; low threshold gain; threshold gain; Absorption; Distributed feedback devices; Gratings; Laser feedback; Optical coupling; Optical design; Optical device fabrication; Optical materials; Quantum well devices; Semiconductor lasers;

fLanguage

English

Publisher

ieee

Conference_Titel

Lasers and Electro-Optics, 1999. CLEO/Pacific Rim '99. The Pacific Rim Conference on

Conference_Location

Seoul, South Korea

Print_ISBN

0-7803-5661-6

Type

conf

DOI

10.1109/CLEOPR.1999.817898

Filename

817898