High-resolution mid-infrared single-photon upconversion ranging  

作　　者：SHUHONG JIANG KUN HUANG TINGTING YU JIANAN FANG BEN SUN YAN LIANG QIANG HAO E.WU MING YAN HEPING ZENG 

机构地区：[1]State Key Laboratory of Precision Spectroscopy,East China Normal University,Shanghai 200062,China [2]Chongqing Key Laboratory of Precision Optics,Chongqing Institute of East China Normal University,Chongqing 401121,China [3]Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China [4]School of Optical Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China [5]Shanghai Research Center for Quantum Sciences,Shanghai 201315,China [6]Guangyang Bay Laboratory,Chongqing Institute for Brain and Intelligence,Chongqing 400064,China

出　　处：《Photonics Research》2024年第6期1294-1302,共9页光子学研究（英文版）

基　　金：National Key Research and Development Program of China(2021YFB2801100);National Natural Science Foundation of China(12022411,62035005,62175064,62235019);Shanghai Pilot Program for Basic Research(TQ20220104);Natural Science Foundation of Chongqing Municipality(CSTB2022NSCQ-JQX0016,CSTB2022NSCQ-MSX0451,CSTB2023NSCQ-JQX0011);Shanghai Municipal Science and Technology Major Project(2019SHZDZX01);Fundamental Research Funds for the Central Universities.

摘　　要：Single-photon laser ranging has widespread applications in remote sensing and target recognition.However,highly sensitive light detection and ranging(lidar)has long been restricted in the visible or near-infrared bands.An appealing quest is to extend the operation wavelength into the mid-infrared(MIR)region,which calls for an infrared photon-counting system at high detection sensitivity and precise temporal resolution.Here,we devise and demonstrate an MIR upconversion lidar based on nonlinear asynchronous optical sampling.Specifically,the infrared probe is interrogated in a nonlinear crystal by a train of pump pulses at a slightly different repetition rate,which favors temporal optical scanning at a picosecond timing resolution and a kilohertz refreshing rate over-50ns.Moreover,the cross-correlation upconversion trace is temporally stretched by a factor of 2×10^(4),which can thus be recorded by a low-bandwidth silicon detector.In combination with the time-correlated photon-counting technique,the achieved effective resolution is about two orders of magnitude better than the timing jitter of the detector itself,which facilitates a ranging precision of 4μm under a low detected flux of 8×10^(−5) photons per pulse.The presented MIR time-of-flight range finder is featured with single-photon sensitivity and high positioning resolution,which would be particularly useful in infrared sensing and imaging in photon-starved scenarios.

关 键 词：resolution lidar REPETITION 

分 类 号：TN215[电子电信—物理电子学]