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用于压缩光探测的高共模抑制比平衡零拍探测器

Balanced Homodyne Detection with High Common Mode Rejection Ratio for Squeezed Light Detection

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摘要

根据光电二极管的等效电路图,基于自减方案的平衡零拍探测器的光电管(ETX500)产生的光电流的位相差异主要由等效电容引起, 通过给两个光电管施加不同的偏置电来补偿等效电容的差异获得高共模抑制比的平衡零拍探测器,在探测器中安装任意两个ETX500,获得了638 dB的高共模抑制比,并且当激光功率达到探测器的饱和功率54 mW时,激光光场的噪声谱在2 MHz处高于电子学噪声37 dB,该探测器能很好地满足压缩态探测对低噪声、线性增益及高共模抑制比的要求。

Abstract

Based on the self-subtraction photodetector scheme, The phase difference is induced from the discrepancy of the equivalent capacitance of two photodiodes.According to the design of the adjustable bias voltage circuit, we adjusted the bias voltage of two photodiodes and made it equal. As a result, a balanced homodyne detector, with the maximum common mode rejection ratio and clearance of 638 dB and 37 dB,was experimentally obtained with two arbitrary photodiodes with the same model, with the clearance of 37 dB at input power of 54 mW. The photodetector is an important tool of detecting squeezed light.

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中图分类号:O438

DOI:10.3788/jqo20162202.0002

基金项目:国家自然科学基金(61575114; 61405107; 11504220); 山西省高校优秀中青年学术带头人; 山西省青年科技研究基金(2015021022)

收稿日期:2016-02-16

修改稿日期:2016-03-03

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靳晓丽:山西大学光电研究所量子光学与光量子器件国家重点实验室,山西 太原 030006极端光学协同创新中心,山西大学,山西 太原 030006
苏静:山西大学光电研究所量子光学与光量子器件国家重点实验室,山西 太原 030006极端光学协同创新中心,山西大学,山西 太原 030006
郑耀辉:山西大学光电研究所量子光学与光量子器件国家重点实验室,山西 太原 030006极端光学协同创新中心,山西大学,山西 太原 030006

联系人作者:靳晓丽(jinxiaoli@sxu.edu.cn)

备注:靳晓丽(1984-), 女, 山西运城人, 博士研究生, 主要从事量子光学及光量子器件方面的研究。

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引用该论文

JIN Xiao-li,SU Jing,ZHENG Yao-hui. Balanced Homodyne Detection with High Common Mode Rejection Ratio for Squeezed Light Detection[J]. Acta Sinica Quantum Optica, 2016, 22(2): 108-114

靳晓丽,苏静,郑耀辉. 用于压缩光探测的高共模抑制比平衡零拍探测器[J]. 量子光学学报, 2016, 22(2): 108-114

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