干涉测量
激光线宽
光学
艾伦方差
波长
激光器
相(物质)
距离测量
信号(编程语言)
外差(诗歌)
外差探测
物理
标准差
计算机科学
数学
统计
量子力学
人工智能
程序设计语言
声学
作者
Hanzhong Wu,Tuo Zhao,Zhiyang Wang,Kai Zhang,Bin Xue,Jianshuang Li,Ming-Ming He,Xinghua Qu
摘要
We perform a long distance measurement up to 1.2 km on the outdoor baseline by electro-optic dual-comb interferometry. A frequency comb pair is developed by phase modulating a continuous laser with a narrow linewidth, and the slightly different repetition frequencies are synchronized to the Rb clock via the signal generators. A RF electrical comb can be generated by multi-wavelength heterodyne interferometry, and thus, a series of synthetic wavelengths can be obtained, whose phases can be used to determine the distances. Compared with the reference values, the experimental results show an agreement within 379 μm in the 1180 m range. In the long-time experiments, the Allan deviation can be below 20 μm with an averaging time of 10 s, and can be further improved to be less than 600 nm when the averaging time is above 350 s at 435 m and 1180 m, respectively.
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