Dual photo-detector system for low phase noise microwave generation with femtosecond lasers
Dual photo-detector system for low phase noise microwave generation with femtosecond lasers
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DOI：
10.1364/ol.39.001204
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发表时间：
2014-03-01
期刊：
影响因子：
3.6
通讯作者：
Le Coq, Yann
中科院分区：
文献类型：
--
作者：
Zhang, Wei;Seidelin, Signe;Le Coq, Yann
通过对锁定在高光谱纯度连续波光学基准上的光学频率梳的脉冲序列进行光检测，可以产生低相位噪声的微波信号。然而，幅相噪声转换是该技术的一个众所周知的限制。由于它对入射光功率的强烈依赖，通常需要非常小心地克服这种限制。在这里，我们展示了结合使用光电探测器的“魔点”工作条件、脉冲重复频率倍增器和微波信号的相干相加，实现了在大范围入射光功率范围内基本上不受幅相转换影响的微波提取装置。(C)2014年美国光学学会
Low phase noise microwave signals can be generated by photo-detecting the pulse train of an optical frequency comb locked to a high spectral purity continuous-wave optical reference. Amplitude-to-phase noise conversion is, however, a well-known limitation to this technique. Great care is usually required to overcome this constraint due to its strong dependence on the impinging optical power. Here we demonstrate the combined use of "magic point" operating conditions of photodetectors, pulse repetition rate multipliers, and coherent addition of microwave signals to realize a microwave extraction device largely immune to amplitude-to-phase conversion effects over a large range of impinging optical powers. (C) 2014 Optical Society of America