Zhang Peng, Wang Tianshu, Jia Qingsong, Sun Hongwei, Dong Keyan, Liu Xin, Kong Mei, Jiang Huilin
Appl Opt. 2014 Apr 10;53(11):2352-6. doi: 10.1364/AO.53.002352.
A simple photonic approach to generate microwave frequency switched microwave signal is proposed and experimentally demonstrated. In this scheme, a Brillouin fiber laser with double-Brillouin-frequency spacing is used. The Brillouin ring configuration suppresses incoming Brillouin pump and even-order Stokes signals in the cavity. In addition, it also allows propagation of the odd-order Brillouin Stokes signals from configuration to output coupler. A dual-wavelength optical signal is heterodyned at the high-speed photodetector to produce a microwave signal. Frequency switched microwave signals, at 10.75 and 21.39 GHz, respectively, can be obtained through adjusting the polarization controller (PC) and loss of the variable optical attenuator (VOA).
提出并通过实验证明了一种产生微波频率切换微波信号的简单光子学方法。在该方案中，使用了具有双布里渊频率间隔的布里渊光纤激光器。布里渊环形配置抑制了腔内入射的布里渊泵浦和偶数阶斯托克斯信号。此外，它还允许奇数阶布里渊斯托克斯信号从配置传播到输出耦合器。双波长光信号在高速光电探测器处进行外差产生微波信号。通过调整偏振控制器（PC）和可变光衰减器（VOA）的损耗，分别可以获得10.75和21.39GHz的频率切换微波信号。
