Research of laser Doppler vibrometer based on dual-frequency ring laser

被引：0
|
作者：
Zhang S. [1 ]
Li Y. [2 ]
Lu G. [2 ]
机构：
[1] No. 91404 Troop, People's Liberation Army, Qinhuangdao, 066000, Hebei
[2] College of Optic-Electronic Science and Engineering, National University of Defense Technology, Changsha, 410073, Hunan
来源：
Guangxue Xuebao/Acta Optica Sinica | 2016年 / 36卷 / 03期
关键词：
Dual-frequency ring laser; Gratings; Laser Doppler; Measurement; Vibration measurement;
D O I：
10.3788/AOS201636.0312003
中图分类号：
学科分类号：
摘要：
In order to improve the resolution of the laser Doppler vibrometer (LDV) and measure surface microvibration, an LDV equipped with a dual-frequency ring laser is proposed. The source and optical path structure of the system are introduced, and the measurement principle is derived. The dual-frequency ring laser, modified by a multioscillator ring laser gyroscope with stable frequency difference and narrow linewidth, can emit two beams in two directions and the two beams show a certain angle and have a fixed frequency difference. Combined with the grating technology, the surface transverse microvibration measurement can be realized. Compared with other LDV, the system has simple optical path and high resolution, and the maximum noise of amplitude resolution is lower than 0.012 μm∙Hz1/2 in the laboratory experiment. © 2016, Chinese Laser Press. All right reserved.
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页数：6
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