基于π移相光纤光栅和扫光SSB-SC探测技术的光纤地震仪

2017 2nd International Conference for Fibre-optic and Photonic Sensors for Industrial and Safety Applications (OFSIS) Pub Date : 1900-01-01 DOI:10.1109/OFSIS.2017.19

Wentao Zhang, Wenzhu Huang, Li Li, Wenyi Liu, Fang Li

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引用次数: 2

摘要

提出了一种基于π移相光纤光栅(π-FBG)的光纤地震仪。利用参考光纤光栅谐振器，采用扫掠光抑制载波单边带(SSB-SC)探测技术测量了π-光纤光栅的静态波长/应变。演示了分辨率为0.0006 pm (0.47 ne ε)的宽带(DC-50 Hz)波长/应变。由于实现了合理的双振膜加速度模型，地震仪在20 ~ 50 Hz范围内工作，噪声级达到-130 dB@1 Hz (re: 10×log m2s-4/Hz)，满足地球背景噪声。该地震仪具有记录高信噪比的近距离小地震的能力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Fiber Optic Seismometer Based on π-Phase-Shifted FBG and Swept Optical SSB-SC Interrogation Technique

A fiber optic seismometer based on π-phase-shifted FBG (π-FBG) is proposed. The static wavelength/strain of the π-FBG is measured by swept optical suppressed carrier single sideband (SSB-SC) interrogation technique with a reference FBG resonator. A broadband (DC-50 Hz) wavelength/strain with 0.0006 pm (0.47 nε) resolution is demonstrated. As a reasonable double-diaphragm acceleration model is realized, the seismometer works from 20 s to 50 Hz and reaches a noise level of -130 dB@1 Hz (re: 10×log m2s-4/Hz) which meets the earth’s background noise. The proposed seismometer has the ability to record the close small earthquake with high signal-noise ratio (SNR).

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2017 2nd International Conference for Fibre-optic and Photonic Sensors for Industrial and Safety Applications (OFSIS)

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