Wang Shaofeng, Liu Wei, Niu Xuyin, Wu Guangqian, Dong Ruifang
Shanxi Key Laboratory of Wireless Communication and Detection, College of Physics and Electronic Engineering, Shanxi University, Taiyuan, Shanxi 030006, China.
Key Laboratory of Time Reference and Applications, National Time Service Center, Chinese Academy of Sciences, Xi'an, Shaanxi 710600, China.
Rev Sci Instrum. 2025 Jan 1;96(1). doi: 10.1063/5.0235927.
In this paper, two models for simulating the shot noise and electronic noise performances of resonant photodetectors designed for homodyne measurements are presented. One is based on a combination of a buffer and a low-noise amplifier, and the other is based on an operational amplifier. Through the comparisons between the numerical simulation results and the experimentally obtained data, excellent agreements are achieved, which show that the models provide a highly efficient guide for the development of a high signal-to-noise ratio (SNR) resonant photodetector. Furthermore, we demonstrate a high SNR resonant photodetector for homodyne measurements at the 147 MHz optical sideband, achieving a 20.8 dB SNR of the shot noise to the electronic noise with a 2 mW optical signal input, utilizing a combination of a buffer and a low-noise amplifier. Concurrently, we have obtained another resonant photodetector at the 1.14 GHz optical sideband, which exhibits a 13 dB SNR based on an operational amplifier.
本文提出了两种用于模拟为零差测量设计的谐振光电探测器散粒噪声和电子噪声性能的模型。一种基于缓冲器和低噪声放大器的组合，另一种基于运算放大器。通过数值模拟结果与实验获得的数据之间的比较，取得了很好的一致性，这表明这些模型为高信噪比（SNR）谐振光电探测器的开发提供了高效的指导。此外，我们展示了一种用于147MHz光边带零差测量的高信噪比谐振光电探测器，在输入2mW光信号时，散粒噪声与电子噪声的信噪比达到20.8dB，采用了缓冲器和低噪声放大器的组合。同时，我们在1.14GHz光边带获得了另一种谐振光电探测器，基于运算放大器，其信噪比为13dB。
