Transient long-range distance measurement by a Vernier spectral interferometry  

作　　者：LIANG XU KUN WANG CHEN LIU WENYING CHEN CHI ZHANG XINLIANG ZHANG 

机构地区：[1]Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan 430074,China [2]Optics Valley Laboratory,Wuhan 430074,China

出　　处：《Photonics Research》2024年第6期1107-1114,共8页光子学研究（英文版）

基　　金：National Natural Science Foundation of China(61735006,61927817,62075072);National Key Research and Development Program of China(2022YFF0705904).

摘　　要：Rapid and long-range distance measurements are essential in various industrial and scientific applications,and among them,the dual-comb ranging system attracts great attention due to its high precision.However,the tem-poral asynchronous sampling results in the tradeoff between frame rate and ranging precision,and the non-ambiguity range(NAR)is also limited by the comb cycle,which hinders the further advancement of the dual-comb ranging system.Given this constraint,we introduce a Vernier spectral interferometry to improve the frame rate and NAR of the ranging system.First,leveraging the dispersive time-stretch technology,the dual-comb interferometry becomes spectral interferometry.Thus,the asynchronous time step is unlimited,and the frame rate is improved to 100 kHz.Second,dual-wavelength bands are introduced to implement a Vernier spectral interferometry,whose NAR is enlarged from 1.5 m to 1.5 km.Moreover,this fast and long-range system also demonstrated high precision,with a 22.91-nm Allan deviation over 10-ms averaging time.As a result,the proposed Vernier spectral interferometry ranging system is promising for diverse applications that necessitate rapid and extensive distance measurement.

关 键 词：INTERFEROMETRY SPECTRAL SYSTEM 

分 类 号：TN247[电子电信—物理电子学]