| 基于Nd:YVO4激光回馈效应的远距离振动测量研究 |
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| 引用本文： | 郭波,秦水介,谈宜东.基于Nd:YVO4激光回馈效应的远距离振动测量研究[J].光电子．激光,2016,27(3):298-302. |
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| 作者姓名： | 郭波 秦水介 谈宜东 |
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| 作者单位： | 贵州大学 贵州省光电子技术及应用重点实验室,贵州 贵阳 550025;贵州大学 贵州省光电子技术及应用重点实验室,贵州 贵阳 550025;清华大学 精密测试及仪器国家重点实验室,北京 100084 |
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| 基金项目： | 国家自然科学基金(61475082)资助项目 (1.贵州大学 贵州省光电子技术及应用重点实验室,贵州 贵阳 550025; 2.清华大学 精密测试及仪器国家重点实验室,北京 100084) |
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| 摘 要： | 基于 Nd:YVO4激光回馈技术,提出了一种实现对远距离微小振动位移直接测量的新方法。相位 测量技术和 移频激光回馈技术的采用,使本文方法不仅有高的分辨率,还有非常高的灵敏度。利用本文 方法对远距离不同目标 进行系统信号信噪比(SNR)测试后,对远距离声音振动进行 测试,清晰还原了声音信号。最后分析了本文方法的 可靠性和测量范围,采用滤除低频噪声的方法,使在15.7m处外界环 境对系统的影响降低到50nm。
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| 关 键 词： | 微小振动 远距离 激光回馈 |
| 收稿时间： | 2015/10/20 0:00:00 |
Remote vibration measurement based on Nd:YVO4laser feedback system |
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| GUO Bo,QIN Shui-jie and TAN Yi-dong.Remote vibration measurement based on Nd:YVO4laser feedback system[J].Journal of Optoelectronics·laser,2016,27(3):298-302. |
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| Authors: | GUO Bo QIN Shui-jie and TAN Yi-dong |
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| Affiliation: | Key Laboratory of Photoelectric Technology and Application of Guizhou Pro vince,Guizhou University,Guiyang 550025,China;Key Laboratory of Photoelectric Technology and Application of Guizhou Pro vince,Guizhou University,Guiyang 550025,China;State Key Laboratory of Precision Measurement Technology and I nstruments,Tsinghua University,Beijing 100084,China |
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| Abstract: | A novel method based on Nd:YVO4las er feedback is presented to realize the direct measurement of remote small vibration.By using the heterodyne phase measurement technology and the laser frequency-shifted feedback technology has not only high resolution and but also high precision.The signal to noise ratio (S NR) of the system is tested,and then the remote voice vibration is measured.Lastly,the reliability and measurement range of the system are analyzed.The impact of external environment on system is down to 50nm at the distance of 15.7m by u sing a filter to filter out the low frequency noise. |
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