Squeezing-enhanced resolution of radio-frequency signals

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外文摘要：We demonstrate a resolution enhancement scheme of radio-frequency signals by tailoring a phase-squeezed state.The echo radio-frequency signals collected by photonic radar give rise to displacements in the phase quadrature of a probe laser and are estimated by the balanced homodyne detector.In contrast to the conventional coherent state,the noise variances for radio-frequency estimation with a squeezed state are reduced by approximately 6.9 dB.According to the Rayleigh criterion that defines the resolution limit,the minimum resolvable displacement Δa with a squeezed state is reduced to 45％compared to that with a coherent state,demonstrating the quantum advantage.The squeezing-enhanced technique has extensive applications for multitarget recognition and tracking in contemporary photonic radar systems.

外文关键词：

phase-squeezed stateradio-frequency signalresolution

作者：

李卫、鞠明健、李庆回、李瑞鑫、姚文秀、武奕淼、王雅君、田龙、史少平、郑耀辉

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作者单位：

State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Opto-electronics,Shanxi University,Taiyuan 030006,China

Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China

State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Opto-Electronics,Shanxi University,Taiyuan 030006,China

出版年：

2024

DOI：

10.3788/COL202422.072701

中国光学快报(英文版)

中国光学学会中国科学院上海光学精密机械研究所

中国光学快报(英文版)

CSTPCD

影响因子：1.305

ISSN：1671-7694

年,卷(期)：2024.22(7)