STABILITY IN SINGLE LONGITUDINAL MODE-OPERATION IN GAINASP-INP PHASE-ADJUSTED DFB LASERS

被引:291
作者
SODA, H
KOTAKI, Y
SUDO, H
ISHIKAWA, H
YAMAKOSHI, S
IMAI, H
机构
[1] Fujitsu Lab Ltd, Atsugi, Jpn, Fujitsu Lab Ltd, Atsugi, Jpn
关键词
SEMICONDUCTING GALLIUM COMPOUNDS;
D O I
10.1109/JQE.1987.1073454
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
A single longitudinal mode (SLM) operating condition for phase-adjusted distributed-feedback (PA-DFB) lasers has been demonstrated both experimentally and theoretically. As expected, a high SLM operation yield of 80% was achieved in a moderately coupled case, up to a light output power of 10 mW. However, in strongly coupled cases, the two-mode operation with the TE 0 mode and the TE plus 1 mode occurred frequently. To explain the two-mode operation and to optimize the PA-DFB laser structure, the authors developed a theory that takes the spatial hole burning along the laser axis into account in explaining the longitudinal mode behavior. From the theory, moderate coupling (kL equals 1. 25) was found to be optimum to maintain the large threshold gain difference above threshold.
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页码:804 / 814
页数:11
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