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Experiment study on Heterodyne Laser Doppler Vibrometry with three different structures

机译：三种不同结构的异质激光多普勒振动计的实验研究

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摘要

The paper present three different all-fiber heterodyne Laser Doppler Vibrometry (HLDV) for acousto-optic communication according to the theory of the coherent detection. A line width of 1 kHz single mode continuous fiber laser and one telescope with a 30mm aperture are used in all of three HLDV. The first HLDV is made up with one acousto-optic frequency shifter (AOFS) and one balanced detector, the second one is made up with two AOFSs and two balanced detectors, and the third one is made up with two AOFSs and one balanced detector. The corresponding vibration measurements on the piezoelectric ceramic were performed and the results were compared in view of the noise floor and the spectrum distribution under 1kHz. For the low-frequency vibration measurement, the HLDV with two AOFSs and two balanced detectors shows a good application potential.
机译：根据相干检测理论，本文提出了三种不同的全光纤外差激光多普勒振动计（HLDV）用于声光通信。三个HLDV均使用线宽为1 kHz的单模连续光纤激光器和一个带30mm孔径的望远镜。第一个HLDV由一个声光移频器（AOFS）和一个平衡检测器组成，第二个HLDV由两个AOFS和两个平衡检测器组成，第三个由两个AOFS和一个平衡检测器组成。在压电陶瓷上进行了相应的振动测量，并根据本底噪声和1kHz以下的频谱分布对结果进行了比较。对于低频振动测量，具有两个AOFS和两个平衡探测器的HLDV具有良好的应用潜力。

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  • 来源
    《Optoelectronic sensing and imaging》|2011年|p.833212.1-833212.7|共7页
  • 会议地点 Wuhan(CN);Wuhan(CN);Wuhan(CN)
  • 作者

    Jianhua Shang; Shuai Yan; Lihong Ren; Shuguang Zhao; Yan He;

  • 作者单位

    School of Information Science technology, Donghua University, 2999 North Renmin Road,Shanghai, China 201620;

    School of Information Science technology, Donghua University, 2999 North Renmin Road,Shanghai, China 201620;

    School of Information Science technology, Donghua University, 2999 North Renmin Road,Shanghai, China 201620;

    School of Information Science technology, Donghua University, 2999 North Renmin Road,Shanghai, China 201620;

    Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Science, 390 Qinghe Road,Shanghai, China 201800;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 光电子技术的应用;
  • 关键词

    coherent detection; heterodyne laser doppler vibrometry; noise floor;

    机译：相干检测外差激光多普勒振动法；本底噪声;

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