基于VT-DBR激光的四通道高速应变测量

2021 19th International Conference on Optical Communications and Networks (ICOCN) Pub Date : 2021-08-23 DOI:10.1109/ICOCN53177.2021.9563804

Ang Lee, Zhenguo Jing, Yueying Liu, Qiang Liu, Ang Li, Yang Cheung, W. Peng

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引用次数: 1

摘要

基于移波长干涉(WSI)技术的应变传感器四通道同时高速解调。这四个传感器基于外部法布里-珀罗干涉测量(EFPI)，通过在两个单模光纤(SMF)段之间拼接一段约500 μ m的空心芯光纤(HCF)来构建。每个传感器对应一个解调通道。我们使用游标转向分布式布拉格反射器(VT-DBR)激光器进行高速波长切换，这在波长域中引入了相移。基于五步移相算法，对任意五个相邻移相信号进行相位恢复，实现高速稳定的相位解调。实验结果表明，该测量系统可以很好地应用于应变的高速测量。

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Four-channel high-speed strain measurement based on VT-DBR laser

Wavelength-shifting interferometry (WSI) based technology enables simultaneous high-speed demodulation of four channels of strain sensors. The four sensors are based on extrinsic Fabry-Perot interferometry (EFPI), which are constructed by splicing a section of hollow-core fiber (HCF) of about 500µm between two single-mode fiber (SMF) segments. Each sensor corresponds to one demodulation channel. We use a vernier-turned distributed Bragg reflector (VT-DBR) laser for high-speed wavelength switching, which introduces a phase shift in the wavelength domain. Based on five-step phase-shifting algorithm, phase recovery is performed with any five adjacent phase-shifting signal to achieve high-speed and stable phase demodulation. Experimental results show that this measurement system can be well applied to high-speed measurement of strain.

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来源期刊

2021 19th International Conference on Optical Communications and Networks (ICOCN)

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