Opt Lett. 2015 Aug 1;40(15):3655-8. doi: 10.1364/OL.40.003655.
We report on the stabilization of a 90-GHz millimeter-wave signal generated from a fully integrated photonic circuit. The chip consists of two DFB single-mode lasers whose optical signals are combined on a fast photodiode to generate a largely tunable heterodyne beat note. We generate an optical comb from each laser with a microwave synthesizer, and by self-injecting the resulting signal, we mutually correlate the phase noise of each DFB and stabilize the beatnote on a multiple of the frequency delivered by the synthesizer. The performances achieved beat note linewidth below 30 Hz.
我们报告了一种 90GHz 毫米波信号的稳定化，该信号是由完全集成的光子电路产生的。该芯片由两个 DFB 单模激光器组成，它们的光信号在快速光电二极管上组合，以产生一个大范围可调谐的外差拍频信号。我们使用微波合成器从每个激光器产生一个光梳，并通过自注入产生的信号，我们相互关联每个 DFB 的相位噪声，并将拍频锁定在合成器提供的频率的倍数上。所实现的性能使拍频线宽低于 30Hz。
