SPATIOTEMPORAL DYNAMICS IN TWIN-STRIPE SEMICONDUCTOR-LASERS
SPATIOTEMPORAL DYNAMICS IN TWIN-STRIPE SEMICONDUCTOR-LASERS
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DOI：
10.1016/0167-2789(94)90063-9
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发表时间：
1994-01-01
期刊：
影响因子：
4
通讯作者：
SCHOLL, E
中科院分区：
文献类型：
--
作者：
HESS, O;SCHOLL, E
双条形半导体激光器是由两个倏逝耦合非线性振荡器组成的系统，具有复杂的时空特性。其动力学理论研究的耦合偏微分方程模型系统的数值积分。倏逝光场的重叠和载流子的扩散决定了激光条纹之间的非线性横向耦合量。引入了由两个子系统组成的动态系统的比特数的累积量的概念和特征时空相关函数，并应用于量化在空间和时间上的复杂性，因为它们在双条纹激光器的输出信号中被观察到。根据相邻振荡器之间的距离，确定了三个动力学机制：足够远的距离，两个激光振荡器是解耦的，该设备显示出稳定的恒定输出信号。在介质耦合的情况下，随机振荡的光脉冲主导输出信号。如果两个条纹是强耦合的，两个激光振荡（固定）相位滞后，但混乱的强度。
The twin-stripe semiconductor laser, a system of two evanescently coupled nonlinear oscillators, shows complex spatio-temporal behaviour. Its dynamics is studied theoretically by numerical integration of a model system of coupled partial differential equations. The overlap of the evanescent optical fields and the diffusion of charge carriers determine the amount of nonlinear transverse coupling between the laser stripes. The concept of cumulants of the bit-number of a dynamical system composed of two sub-systems, and a characteristic spatio-temporal correlation function are introduced and applied to quantify the complexities in space and time as they are observed in the output signal of the twin-stripe laser. Depending on the distance between the adjacent oscillators, three dynamical regimes are identified: Sufficiently far apart, the two laser oscillators are uncoupled and the device shows a steady constant output signal. In the regime of medium coupling, randomly oscillating light pulses dominate the output signal. If both stripes are strongly coupled, both lasers oscillate with a (fixed) phase lag but chaotic intensities.