线性光学采样算法中的多普勒补偿研究  

Research on Doppler compensation in linear optical sampling algorithm

作　　者：施锡平 刘尉悦[1] SHI Xiping;LIU Weiyue(College of Information Science and Engineering,Ningbo University,Ningbo 315211,China)

机构地区：[1]宁波大学信息科学与工程学院,浙江宁波315211

出　　处：《量子电子学报》2024年第5期729-737,共9页Chinese Journal of Quantum Electronics

基　　金：浙江省自然科学基金(LY21F050003)。

摘　　要：基于双光梳的时频传递技术在实验中已经实现稳定的时频传输。然而,当双光梳两端存在相对运动而产生多普勒效应时,涉及的线性光学采样算法将不能满足要求。为了能够精确解算多普勒效应导致的干涉信号时间延时和频率偏移,本文推荐了一种基于宽带互模糊函数的时差频差联合估计算法。仿真模拟了特定参数下,光梳延时为38.78 fs,相对速度在0~1800 m/s之间的若干组干涉信号,所推荐算法仿真得出时延误差为0,速度误差小于0.3 m/s。相对于窄带互模糊函数,该算法具有更好的大速度下时间及频率尺度估计性能。The time-frequency transmission technology based on two optical combs has been able to achieve stable time-frequency transmission in experiment.However,the linear optical sampling algorithm will suffer from Doppler effect when there is relative motion on both sides of the two optical combs.In order to accurately calculate the time delay and frequency shift of the interference signal caused by Doppler effect,a joint estimation algorithm of time difference and frequency offset based on wide-band cross ambiguity function is studied.Several groups of interference signal are simulated under specific parameters when the optical comb delay is 38.78 fs and the relative speed is between 0 and 1800 m/s.In this speed interval,the delay error is 0 and the speed error is less than 0.3 m/s.Compared with the narrow-band cross ambiguity function,the proposed algorithm has better performance of time and frequency scale estimation at high speed.

关 键 词：量子信息 量子精密测量 线性光学采样 多普勒效应 时差频差 宽带互模糊函数 

分 类 号：TH714[机械工程—测试计量技术及仪器]