Vibration displacement immunization model for measuring the free spectral range by means of a laser self-mixing velocimeter

Zhao Yunkun; Xu Guanting; Zhang Chen; Liu Keyan; Lu Liang

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Vibration displacement immunization model for measuring the free spectral range by means of a laser self-mixing velocimeter

机译：借助激光自混合速度计测量自由光谱范围的振动位移免疫模型

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摘要

In this paper, a vibration-displacement immunization model is proposed to measure the free spectral range of a resonant cavity by using a laser self-mixing velocimeter. The validity of this method is demonstrated by the experimental results, which can effectively get rid of low measurement accuracy related to the self-mixing vibration system due to the vibratory displacement. According to the periodic waveform separation characteristic of the self-mixing velocity signal, the free spectral range of a multilongitudinal mode diode laser is calculated to be 88.24 GHz. Moreover, the influences of different target velocities and signal sampling frequencies on the free spectral range have been analyzed in detail from the theoretical analysis. In the case of high signal sampling rate and low velocity, from which the undistorted velocity signal waveform at the integral order external cavity mode keeps stable, it is possible to obtain relatively accurate measured results. (C) 2019 Optical Society of America

机译：在本文中，提出了一种振动位移免疫模型来通过使用激光自混合速度计测量谐振腔的自由谱范围。通过实验结果证明了该方法的有效性，其可以有效地摆脱由于振动位移而与自混合振动系统相关的低测量精度。根据自混合速度信号的周期性波形分离特性，将多不合态二极管激光器的自由谱范围计算为88.24GHz。此外，从理论分析中详细分析了不同靶速度和信号采样频率对自由谱范围的影响。在高信号采样率和低速度的情况下，整体顺序外腔模式下未置换的速度信号波形保持稳定，可以获得相对准确的测量结果。（c）2019年光学学会

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《Applied optics》 |2019年第20期|共7页
作者
Zhao Yunkun; Xu Guanting; Zhang Chen; Liu Keyan; Lu Liang;
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作者单位

Anhui Univ Minist Educ Key Lab Optoelect Informat Acquisit &

Manipulat Jiulong Rd 111 Hefei 230601 Anhui Peoples R China;

Anhui Univ Minist Educ Key Lab Optoelect Informat Acquisit &

Manipulat Jiulong Rd 111 Hefei 230601 Anhui Peoples R China;

Anhui Univ Minist Educ Key Lab Optoelect Informat Acquisit &

Manipulat Jiulong Rd 111 Hefei 230601 Anhui Peoples R China;

Anhui Univ Minist Educ Key Lab Optoelect Informat Acquisit &

Manipulat Jiulong Rd 111 Hefei 230601 Anhui Peoples R China;

Anhui Univ Minist Educ Key Lab Optoelect Informat Acquisit &

Manipulat Jiulong Rd 111 Hefei 230601 Anhui Peoples R China;

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Vibration displacement immunization model for measuring the free spectral range by means of a laser self-mixing velocimeter

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