多像素平衡零拍探测器研究  

Multi-Pixel Balanced Homodyne Detector

作　　者：王少锋 李汉卿[1] 李康康 刘鹏 李娟 董瑞芳 Wang Shaofeng;Li Hanqing;Li Kangkang;Liu Peng;Li Juan;Dong Ruifang(College of Physics and Electronic Engineering,Shanxi University,Taiyuan 030006,Shanxi,China;Key Laboratory of Time Reference and Applications,National Time Service Center,Chinese Academy of Sciences,Xi an 710600,Shaanxi,China;School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]山西大学物理电子工程学院,山西太原030006 [2]中国科学院国家授时中心中国科学院时间基准及应用重点实验室,陕西西安710600 [3]中国科学院大学天文与空间科学学院,北京100049

出　　处：《光学学报》2024年第5期29-35,共7页Acta Optica Sinica

基　　金：国家自然科学基金(12033007,61801458,12103058,12203058,12074309,61875205);中国科学院青年创新促进会项目(2021408,2022413,2023425);中国博士后科学基金(2022M723174)。

摘　　要：平衡零拍探测技术是测量压缩态量子噪声的主要方法之一,通过光电二极管阵列和多路并行电感-电容(L-C)耦合跨阻的方式,实现了一种低噪声、高信噪比的多像素平衡零拍探测器,探测器的工作带宽为5 MHz。每一个像素通道中,光功率为1.66 mW的815 nm激光入射时,散粒噪声功率在2 MHz分析频率处比电子学噪声高23 dB。当光强分布在所有像素通道时,各通道散粒噪声功率和入射光强成正比,验证了探测器可以实现多通道并行的平衡零拍探测。该探测器可实现量子光学频率梳的频谱可分辨平衡零拍探测,为量子光学频率梳在量子精密测量领域的应用提供高性能的探测工具。Objective As an important tool for quantum optical measurement,the balanced homodyne detector(BHD)is highly sensitive to the amplitude and phase of the incident light.It can reliably extract quantum fluctuations,suppress classical common-mode noise,and amplify quantum fluctuations to the macro level.Additionally,it has been widely employed in quantum noise measurement,gravitational wave detection,high-sensitivity interferometric timing measurement,continuous variable quantum key distribution,and quantum random number generator.The common-mode rejection ratio(CMRR),operating bandwidth,and signal-to-noise ratio(SNR)of the detector have been the research focuses.The optical frequency comb contains a large number of equally spaced longitudinal modes,which is a good multi-mode resource.The spectrum width of the optical frequency comb is in the order of nanometers.The quantum optical frequency comb which breaks the limit of shot noise can be generated by nonlinear processes.Quantum optical frequency comb has a great application prospect in quantum precision measurement.Spectrally resolved balanced homodyne detection is an important detection method of quantum optical frequency comb.We analyze the noise source of the balanced homodyne detector theoretically and design the multi-pixel balanced homodyne detector(MBHD)based on photodiode array and multi-channel inductance-capacitance(L-C)coupled transimpedance amplifier(TIA)circuit.These designs enable MBHD to meet multichannel parallel and high-SNR quantum noise measurements.Methods The MBHD consists of two highly symmetrical multi-pixel photodetectors(MPDs)and a multi-channel subtracter(Fig.1).Each MPD includes a photodiode array,a multi-channel L-C coupled structure,AC amplification,and DC amplification.The photocurrent generated by the corresponding pair of pixels in the two MPD flows through their respective AC amplification outputs,and the common-mode signal in the detection result is eliminated by the subtracter to complete the multi-pixel parallel balanced homodyne

关 键 词：探测器 跨阻放大器 量子光学频率梳 平衡零拍探测器 光电二极管阵列 信噪比 

分 类 号：O431.2[机械工程—光学工程]