基于电光调制光频梳绝对测距的理论及实验分析  

Theoretical Analysis and Application of Absolute Distance Measurements Based on Electro-Optic Modulation and Optical Frequency Comb

作　　者：赵宇航 曲兴华[1] 张福民[1] 赵显宇 汤国庆 Zhao Yuhang;Qu Xinghua;Zhang Fumin;Zhao Xianyu;Tang Guoqing(State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University,Tianjzn 300072,China;Key Laboratory of Optoeleetronics Information Technique,Ministry of Education Tianjin University,Tzanjin 300072,China)

机构地区：[1]天津大学精密测试技术及仪器国家重点实验室,天津300072

出　　处：《中国激光》2018年第12期154-161,共8页Chinese Journal of Lasers

基　　金：国家自然科学基金(51675380);微光机电系统技术教育部重点实验室开放课题自主资助基金(MOMST 2016-01)

摘　　要：为满足高精度、大尺寸、高动态的测量需求,提出一种基于光学频率梳方法的绝对测量方案。采用级联相位调制器和强度调制器的电光调制方法生成平坦的光学频率梳,可以实现频率的直接溯源,成本低且易于复现。实现了对数学模型的建立及生成质量的评估,并且将其应用于改进的多波长测距系统中。该系统实现了对传统的多波长测量系统的简化,通过解算出合成波长的相位信息实现了对绝对距离的测量以及对测量过程中噪声和不确定度的分析。To meet the requirements of high-precision, long-distance, and highly dynamic measurements, this article proposes a scheme for absolute distance measurement based on optical frequency combs. Cascaded phase modulators and intensity modulators are used to electro-optically generate a flat-top optical frequency comb. The system offers advantages, including direct traceability, cost efficiency, and reproducibility. Furthermore, a mathematical model is formulated and used to assess the quality of the optical frequency comb generated for use in a multi-heterodyne ranging system. The system is simpler than traditional multi-wavelength measurement systems, and realizes absolute distance measurements by extracting phase information from the synthesized wavelengths of the optical comb. The mathematical model presented herein is used to analyze the noise and uncertainty involved in the system.

关 键 词：测量 激光测试 光学计量仪器 光电测距 

分 类 号：O348.11[理学—固体力学] TH471[理学—力学]