AlMulla Mohammad, Liu Jia-Ming
Opt Express. 2020 May 11;28(10):14677-14693. doi: 10.1364/OE.391854.
Period-one (P1) nonlinear dynamics of optically injected semiconductor lasers exhibit periodic intensity fluctuations with operating frequencies that are tunable in the micro/millimeter-wave range. Through numerical experiments, the characteristics of the microwave linewidth of the P1 oscillation and the linewidths of its optical frequency components due to intrinsic laser noise sources are investigated. The field noise and carrier noise of the master and slave lasers are systematically considered. The contribution of the field noise of the master laser is significant; it considerably broadens the microwave linewidth of the P1 oscillation. When the operating conditions in the regions of high microwave power are properly adjusted, the microwave linewidth of the P1 oscillation becomes narrower than the free-running optical linewidths of the master and slave lasers. Regions with low sensitivity to time-dependent fluctuations in an operating parameter show reduced microwave linewidth of the P1 oscillation.
光注入半导体激光器的一阶（P1）非线性动力学表现出周期性强度波动，其工作频率可在微/毫米波范围内调谐。通过数值实验，研究了P1振荡的微波线宽特性及其由于激光固有噪声源导致的光频分量线宽。系统地考虑了主激光器和从激光器的场噪声和载流子噪声。主激光器的场噪声贡献显著；它大大拓宽了P1振荡的微波线宽。当在高微波功率区域的工作条件得到适当调整时，P1振荡的微波线宽变得比主激光器和从激光器的自由运行光学线宽窄。对工作参数中与时间相关的波动敏感度较低的区域，P1振荡的微波线宽减小。
