All-fiber pulsed laser Doppler vibrometer development based on time-domain chopping techniques

Shisong Wu; Yuanyang Li; Tao Lü; Hongkai Chen; Chunhui Yan; Tingfeng Wang; Jin Guo

doi:10.3788/COL201917.051201

Chinese Optics Letters, Volume. 17, Issue 5, 051201(2019)

All-fiber pulsed laser Doppler vibrometer development based on time-domain chopping techniques

Shisong Wu^1,2, Yuanyang Li^1、*, Tao Lü^1,2, Hongkai Chen^1,2, Chunhui Yan^1,2, Tingfeng Wang^1,2, and Jin Guo^1,2

Author Affiliations

¹Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China

²Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

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Fig. 1. Schematic diagram of the all-fiber pulsed LDV system.

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Fig. 2. Principle of TDC signal process method: (a) heterodyne mixing signal, (b) matched filtered signal, and (c) time-chopped signal.

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Fig. 3. Voice acquisition experiment layout.

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Fig. 4. Waveform and spectrum of (a) voice recorded by a microphone and (b) voice demodulated from a file folder at a 25 m standoff.

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Table 1. Transmission Loss of the Optical Path in the System

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Table 1. Transmission Loss of the Optical Path in the System

	Parameter	Value
Theoretical value	AOFS insertion loss	3 dB
Circulator insertion loss	1 dB
Collimator with anti-reflective coating	0.2% reflectivity
Zoom telescope with anti-reflective coating	0.2% reflectivity
$2 \times 2$ coupler insertion loss	$\leq 3.4 dB$
$1 \times 2$ splitter insertion loss	$\leq 0.8 dB / \leq 10.5 dB$
Measurement test

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Shisong Wu, Yuanyang Li, Tao Lü, Hongkai Chen, Chunhui Yan, Tingfeng Wang, Jin Guo, "All-fiber pulsed laser Doppler vibrometer development based on time-domain chopping techniques," Chin. Opt. Lett. 17, 051201 (2019)

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Paper Information

Category: Instrumentation, measurement, and metrology

Received: Dec. 20, 2018

Accepted: Feb. 22, 2019

Posted: Mar. 22, 2019

Published Online: May. 23, 2019

The Author Email: Yuanyang Li (liyuanyang1108@163.com)

DOI:10.3788/COL201917.051201

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology