Two-segment cavity theory for mode selection in semiconductor lasers
Two-segment cavity theory for mode selection in semiconductor lasers
复制标题
半导体激光器模式选择的两段腔理论
DOI：
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发表时间：
1984
期刊：
影响因子：
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通讯作者：
J. Buus
中科院分区：
文献类型：
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作者：
M. Adams;J. Buus
本文分析了一种简单的三镜组合激光腔，并根据中心反射镜的位置和反射率的大小提出了最佳结构，以实现单纵模运转。讨论了两种最佳结构，第一种对应于相对较长的腔，其中需要大的增益调制周期，以避免跳到具有高有效反射率的下一个模式，通常在第二模式组中（由相邻的定义）增益调制周期）。第二个对应于较短的激光器，其中应该避免跳到相邻模式，因为光谱增益变化防止跳到其他模式组。分析了外反馈对模式识别的影响，导出了保持内模选择性时第三反射镜反射率的最小值。
A simple three-mirror composite laser cavity is analyzed and optimum structures proposed in terms of the position of the central reflector and the value of its reflectivity in order to give single longitudinal mode operation. Two optimum structures are discussed, the first corresponding to relatively long cavities where a large period in the gain modulation is required in order to avoid a jump to the next mode with a high effective reflectivity, usually in a second mode group (as defined by a neighboring period of the gain modulation). The second corresponds to shorter lasers where jumps to neighboring modes should be avoided, since the spectral gain variation prevents jumps to other mode groups. The effects of mode discrimination due to external feedback have been analyzed and minimum values of reflectivity for the third mirror derived in order to preserve the internal mode selectivity.