Title :
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
fDate :
Aug. 30 1999-Sept. 3 1999
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;
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
DOI :
10.1109/CLEOPR.1999.817898
