Reduction of cyclic error induced by electromagnetic contamination in an EO-comb based distance measurement system
Reduction of cyclic error induced by electromagnetic contamination in an EO-comb based distance measurement system
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DOI：
10.1016/j.rio.2022.100308
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发表时间：
2022-12
影响因子：
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通讯作者：
Runmin Li;Haochen Tian;K. Minoshima
中科院分区：
文献类型：
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作者：
Runmin Li;Haochen Tian;K. Minoshima
在这项工作中，我们研究了循环误差对基于电光 (EO) 梳和外差干涉仪的距离测量系统线性度的影响。具有 10 GHz 重复率和 1.91 ps 脉冲持续时间的 EO 梳是通过级联强度和相位调制器调制 1540 nm CW 激光器而生成的。对声光移频器（AOFS）驱动信号电磁污染引起的循环误差进行了仿真和实验验证。循环误差的幅度与数值模拟吻合良好。通过光学部分和电气部分的分离，有效降低了循环误差。
In this work, we study the impact of cyclic error on the linearity of a distance measurement system based on an electro-optic (EO) comb and a heterodyne interferometer. The EO comb with 10 GHz repetition rate and 1.91 ps pulse duration is generated by modulating a 1540-nm CW laser through cascaded intensity and phase modulators. The cyclic error that induced by electromagnetic contamination from the driven signal of acoustic-optic frequency shifter (AOFS) are simulated and experimentally verified. The amplitude of the cyclic error corresponds well with numerical simulation. Through separating the optical part and electrical part, the cyclic error is effectively reduced.