Hung Yu-Han, Hwang Sheng-Kwang
Opt Express. 2015 Mar 9;23(5):6520-32. doi: 10.1364/OE.23.006520.
Photonic microwave generation using period-one nonlinear dynamics of semiconductor lasers suffers from poor spectral purity. A stabilization approach based on optical modulation sideband injection locking is investigated. An optical signal carrying a highly correlated modulation sideband comb simultaneously injection-locks the regeneration of the optical carrier and the lower oscillation sideband in the dynamics, establishing a phase-locking between the two spectral components. A linewidth of below 1 Hz is therefore achieved for microwave generation up to at least 40 GHz. Because of the frequency multiplication in yielding the comb-like optical signal, only an electronic microwave reference at the tenth subharmonic or higher of the generated microwave frequency is required.
利用半导体激光器的一阶非线性动力学产生光子微波存在光谱纯度差的问题。研究了一种基于光调制边带注入锁定的稳定化方法。携带高度相关调制边带梳的光信号同时注入锁定光载波的再生和动力学中的较低振荡边带，在两个光谱分量之间建立锁相。因此，对于高达至少40GHz的微波产生，实现了低于1Hz的线宽。由于产生梳状光信号时的倍频，仅需要产生的微波频率的十分之一或更高次谐波处的电子微波参考。
