Effects of detuning, gain-guiding, and index antiguiding on the dynamics of two laterally coupled semiconductor lasers
Effects of detuning, gain-guiding, and index antiguiding on the dynamics of two laterally coupled semiconductor lasers
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DOI：
10.1103/physreva.95.053869
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发表时间：
2017-05-30
影响因子：
2.9
通讯作者：
Henning, I. D.
中科院分区：
文献类型：
--
作者：
Adams, M. J.;Li, Nianqiang;Henning, I. D.
利用耦合模理论，考虑激光器之间的频率失谐，研究了四个具有不同波导结构的横向耦合半导体激光器的例子。这些结构包括纯真实的索引引导、纯增益引导以及索引引导和反引导与增益引导的组合。使用AUTO软件（标准数值延拓包）、线性稳定性分析和速率方程的直接积分探索了这四个系统的动力学。通过这三种方法得到的结果之间的令人信服的协议已被证明，包括由于激光泵浦速率，失谐量和线宽增强因子的变化的影响。激光分离行为的周期性已经被揭示出来，这是以前被忽视的。随着系统结构从纯真实的导引结构发展到指数反导引和增益导引相结合的结构，这种周期性对系统分叉的影响越来越大。所使用的激光器的设计和操作参数是现实的，为广泛的边缘发射和表面发射激光器的实际重要性，使这里研究的动力学相关的耦合激光器的真实的系统。
Four examples of laterally coupled semiconductor lasers with different waveguiding structures have been studied using coupled mode theory and allowing for frequency detuning between the lasers. The structures include purely real index guiding, pure gain-guiding, and combinations of index guiding and antiguiding with gain-guiding. The dynamics of these four systems have been explored using AUTO software (standard numerical continuation package), linear stability analysis, and direct integration of the rate equations. Convincing agreement between results obtained by these three methods has been demonstrated, including effects due to variation of laser pumping rate, detuning, and linewidth enhancement factor. A periodicity of behavior with laser separation has been revealed that was previously overlooked. This periodicity has increasing influence on the bifurcations of the system as the structures develop from those with purely real guidance to a combination of index antiguiding and gain-guiding. The laser design and operating parameters used are realistic for a wide range of edge-emitting and surface-emitting lasers of practical importance, so that the dynamics studied here are relevant to real systems of coupled lasers.