文献类型：期刊文献

英文题名：Low Noise Balanced Homodyne Detector for Quantum Noise Measurement

作者：Lang, Shubo[1];Zhang, Shicheng[1];Li, Xiaolin[1];Niu, Yueping[1,2];Gong, Shangqing[1,2]

机构：[1]East China Univ Sci & Technol, Sch Phys, Shanghai 200237, Peoples R China;[2]Shanghai Engn Res Ctr Hierarch Nanomat, Shanghai 200237, Peoples R China

年份：2022

卷号：10

起止页码：27912

外文期刊名：IEEE ACCESS

收录：;EI(收录号：20221011757773);WOS:【SCI-EXPANDED(收录号:WOS:000770584400001)】；

基金：This work was supported in part by the National Natural Science Foundation of China under Grant 12034007, Grant 11874146, Grant 12004112, and Grant 61835013; in part by the Shanghai Sailing Program under Grant 20YF1410800; and in part by the Shanghai Natural Science Foundation under Grant 20ZR1414300.

语种：英文

外文关键词：Quantum noise; balanced homodyne detector; low noise; electromagnetically induced transparency

摘要：The research of quantum noise in the interaction of laser and atoms plays a critical role in quantum optical experiments. The measurement of quantum noise is mainly based on the balanced homodyne detection method. Here, we reported a balanced homodyne detector with low noise, high gain, and high common-mode rejection ratio (CMRR) at the wavelength of 795 nm. By optimizing the selection of components and printed circuit board (PCB) layout, a minimum electronic noise of -96.7 dBm is obtained. Over the range of 1 MHz to 5 MHz, we get a flat CMRR above 59 dB and a linear gain regime, which can enable a shot noise measurement with the laser power of 100 mu w. The developed detector can be used in quantum coherent experiments with a weak probe laser of power down to tens of microwatts.