STABILITY IN SINGLE LONGITUDINAL MODE-OPERATION IN GAINASP-INP PHASE-ADJUSTED DFB LASERS
STABILITY IN SINGLE LONGITUDINAL MODE-OPERATION IN GAINASP-INP PHASE-ADJUSTED DFB LASERS
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DOI：
10.1109/jqe.1987.1073454
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发表时间：
1987-06-01
影响因子：
2.5
通讯作者：
IMAI, H
中科院分区：
文献类型：
--
作者：
SODA, H;KOTAKI, Y;IMAI, H
从实验和理论上明确了调相DFB激光器的单纵模(SLM)工作条件。不出所料，在光输出功率为10 mW的中等耦合情况下，我们获得了80%的高SLM运转效率。然而，在强耦合情况下，TE0模和TE+1模的双模工作频繁发生。为了解释双模运转和优化PA-DFB激光器的结构，我们发展了一个理论。考虑到沿激光轴线的空间烧孔，我们成功地解释了纵模行为。根据我们的理论，适度的耦合()被发现是维持在阈值之上的大阈值增益差的最佳选择。
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 () was found to be optimum to maintain the large threshold gain difference above threshold.