光学学报, 2017, 37 (1): 0112003, 网络出版: 2017-02-07
基于光梳多波长干涉实时绝对测距的同步相位解调 下载: 679次
Synchronous Phase Demodulation for Real-Time Absolute Distance Measurement Based on Optical Comb Multi-Wavelength Interferometry
测量 绝对测距 光梳 多波长干涉 同步相位解调 measurement absolute distance measurement optical comb multi-wavelength interferometry synchronous phase demodulation
摘要
光梳的出现带来了大尺寸高精度绝对测距(ADM)技术的革新, 其卓越的光频特性推动了基于多波长干涉的实时ADM的发展。为在基于光梳多波长干涉的实时ADM中实现干涉信号的同步相位解调, 提出了基于多波长外差干涉的多路同步相位解调信号处理方法, 研制了相应的同步相位解调模块。实验中通过对波长进行解复用, 测试了多路相位计的线性精度、稳定度和同步性等性能, 对多波长干涉信号的实时同步相位解调进行了实验分析, 验证了该方法实现高精度同步相位解调的可行性。
Abstract
The advent of optical comb has brought technical innovation for large-scale and high-precision absolute distance measurement (ADM). The marvelous features of optical frequency facilitate the great development to the real time ADM based on multi-wavelength interferometry. To realize synchronous phase demodulation for interference signals in real-time ADM based on optical comb multi-wavelength interferometry, we propose a multi-channel synchronous phase demodulation signal-processing method based on multi-wavelength heterodyne interferometry, and develope a related phase demodulation module. The wavelength de-multiplexing is conducted in the experiment. Performances of the multi-channel phasemeter, such as linear precision, stability and synchronization, are tested. The experimental analysis about the real-time synchronous phase demodulation for multi-wavelength interference signal is carried out, and the feasibility of realizing high-precision synchronous phase demodulation with the proposed method is verified.
王国超, 谭立龙, 颜树华, 魏春华. 基于光梳多波长干涉实时绝对测距的同步相位解调[J]. 光学学报, 2017, 37(1): 0112003. Wang Guochao, Tan Lilong, Yan Shuhua, Wei Chunhua. Synchronous Phase Demodulation for Real-Time Absolute Distance Measurement Based on Optical Comb Multi-Wavelength Interferometry[J]. Acta Optica Sinica, 2017, 37(1): 0112003.