DocumentCode :
1113955
Title :
Stability in single longitudinal mode operation in GaInAsP/InP phase-adjusted DFB lasers
Author :
Soda, Haruhisa ; Kotaki, Yuji ; Sudo, Hisao ; Ishikawa, Hiroshi ; Yamakoshi, Sigeyuki ; Imai, Hajime
Author_Institution :
Fijitsu Lab., Ltd., Atsugi, Japan
Volume :
23
Issue :
6
fYear :
1987
fDate :
6/1/1987 12:00:00 AM
Firstpage :
804
Lastpage :
814
Abstract :
A single longitudinal mode (SLM) operating condition for phase-adjusted (PA) DFB lasers has been made clear both experimentally and theoretically. As expected, we got a high SLM operation yield of 80 percent in a moderate coupled case up to a light output power of 10 mW. However, in the strongly coupled cases, the two-mode operation with the TE0 mode and the TE + 1 mode occurred frequently. To explain the two-mode operation and to optimize the PA-DFB laser structure, we have developed a theory. Taking the spatial hole burning along the laser axis into account, we succeeded in explaining the longitudinal mode behavior. From our theory, moderate coupling ( kL = 1.25 ) was found to be optimum to maintain the large threshold gain difference above threshold.
Keywords :
Distributed feedback (DFB) lasers; Gallium materials/lasers; Laser modes; Laser stability; Distributed feedback devices; Indium phosphide; Laser feedback; Laser modes; Laser noise; Laser stability; Laser theory; Mirrors; Optical coupling; Power generation;
fLanguage :
English
Journal_Title :
Quantum Electronics, IEEE Journal of
Publisher :
ieee
ISSN :
0018-9197
Type :
jour
DOI :
10.1109/JQE.1987.1073454
Filename :
1073454
Link To Document :
بازگشت