面向连续变量量子随机数产生的宽带高平坦度平衡零拍探测器  

Broadband and High-Flatness Balanced Homodyne Detector for Continuous-Variable Quantum Random Number Generation

作　　者：邓娟 郭龑强 林鸿[1] 林杰弘 郭晓敏 Deng Juan;Guo Yangqiang;Lin Hong;Lin Jiehong;Guo Xiaomin(Key Laboratory of Advanced Transducers and Intelligent Control System,Ministry of Education,College of Physics,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China;State Key Laboratory of Cryptology,Beijing 100878,China)

机构地区：[1]新型传感器与智能控制教育部重点实验室,太原理工大学物理学院,山西太原030024 [2]密码科学技术国家重点实验室,北京100878

出　　处：《激光与光电子学进展》2024年第9期192-201,共10页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(62075154,62175176);山西省重点研发计划(国际科技合作201903D421049)。

摘　　要：面向连续变量量子随机数产生的应用场景,基于级联放大的方式构建宽带高增益平衡零拍探测器,首次将分布参数电路分析法、优化仿真法引入到平衡零拍探测器的电路设计中,针对性地改善该特高频电路的传输特性,并以系统稳定性指标为指导,寻求电路设计及关键元器件参数的最优解,完成电路设计。最终制作出带宽高于1.65 GHz、在0.2~930 MHz范围内增益平坦度达到±2 dB的平衡零拍探测器。该研究为宽带平衡零拍探测器提供了一种新的设计思路,实验所得探测器的性能有利于更高效地提取连续变量量子态随机熵源,将有效促进连续变量量子随机数发生器的速率提高和实用化发展。This study presents a highgain broadband balanced homodyne detector,utilizing cascade amplification to generate continuousvariable quantum random numbers.The innovative approach of distributed parameter circuit analysis and optimization simulation is introduced into the circuit design of the broadband balanced homodyne detector.The objective is to enhance the transmission attributes of the ultrahighfrequency circuit.This is realized by optimally combining different elements and selecting key electronic components,guided by system stability indicators.Hence,a balanced homodyne detector was developed with a bandwidth surpassing 1.65 GHz and gain flatness of±2 dB within the 0.2‒930 MHz range.This study proposes a novel design perspective for broadband balanced homodyne detectors.The enhanced features of the detectors facilitate a more efficient derivation of continuousvariable quantum state random entropy sources,thereby propelling the rate enhancement and practical advancement of continuousvariable quantum random number generators.

关 键 词：量子光学 量子随机数发生器 平衡零拍探测器 高带宽及高平坦度 分布参数电路分析法 

分 类 号：O431.2[机械工程—光学工程]