Phase information-assisted method to obtain position of zero optical path difference for a pulse-train interferometer
Phase information-assisted method to obtain position of zero optical path difference for a pulse-train interferometer
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DOI：
10.1117/1.oe.57.11.114106
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发表时间：
2018-11
影响因子：
1.3
通讯作者：
D. Wei;Yusuke Nagata;M. Aketagawa
中科院分区：
文献类型：
--
作者：
D. Wei;Yusuke Nagata;M. Aketagawa
抽象的。在脉冲串干涉仪中，利用干涉条纹信号的包络峰值可以得到参考镜和物镜之间的零光程差的位置。根据通信理论，与包络/幅度信息相比，频率/相位信息可以提供更高的精度。针对脉冲串干涉仪，提出了一种基于相位信息的零OPD定位方法。利用实验数据论证并验证了该相位法可以高精度地确定零OPD的位置。该方法可靠，对长度测量具有良好的性能。
Abstract. In a pulse-train interferometer, the position of zero optical path difference (OPD) between the reference and object mirror can be obtained using the envelope peak of the interference fringe signal. Based on communication theory, frequency/phase information can provide higher accuracy compared to envelope/amplitude information. We propose a phase information-assisted method to obtain the position of zero OPD for a pulse-train interferometer. We demonstrate and verify that this phase approach can be used to determine the position of zero OPD with high accuracy using experimental data. This method is reliable and provides good performance for length measurement.