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单模-多模-单模光纤结构在安防系统的实验研究

Experimental Research on Single Mode-Multimode-Single Mode Fiber Structure in Security System

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摘要

基于模间干涉原理, 将单模-多模-单模(SMS)光纤结构运用于光纤安防系统中。以多模光纤为传感光纤, 结合小波变换处理, 实现对外界振动入侵事件的探测。理论分析了多模光纤的模间干涉原理, 并分别将两路传感光纤置于围栏和铺设在地面上, 对几种振动入侵事件进行实验分析。研究结果表明:该结构型传感器能够快速有效地探测到振动入侵信号, 在光纤安防领域中具有较好的可行性。该结构型传感系统由于其结构简单、成本低廉等优点, 在光纤安防系统中具有重要意义。

Abstract

Based on the principle of inter mode interference, we apply the single mode-multimode-single mode (SMS) optical fiber structure to the optical fiber security system. In the system, multimode optical fiber is used as sensing fiber, and wavelet transform is used to realize the detection of external vibration signals. The theory of intermodal interference of multimode optical fiber is analyzed. The sensing optical fiber is arranged in the fence and laid on the ground, respectively. Several vibration invasive events are analyzed in experiment. The experimental results show that the sensing system of this structure can detect the vibration invasive signal quickly and effectively, and it has good feasibility in the field of security in optical fiber. The structure sensing system maintains the advantages of simple structure, low-cost, which has very important significance in optical fiber security systems.

Newport宣传-MKS新实验室计划
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中图分类号:TN253

DOI:10.3788/lop55.060603

所属栏目:光纤光学与光通信

基金项目:中央高校培育型科技创新人才资助项目(ZQN-PY306);福建省自然科学基金对外合作项目(2015I0005)

收稿日期:2017-11-22

修改稿日期:2017-12-14

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游赐天:华侨大学信息科学与工程学院, 福建 厦门 361021福建省光传输与变换重点实验室, 福建 厦门 361021
陈沛超:华侨大学信息科学与工程学院, 福建 厦门 361021福建省光传输与变换重点实验室, 福建 厦门 361021
丁攀峰:华侨大学信息科学与工程学院, 福建 厦门 361021福建省光传输与变换重点实验室, 福建 厦门 361021

联系人作者:丁攀峰(dingpanfeng@163.com)

备注:游赐天(1992-), 男, 硕士研究生, 主要从事光纤传感方面的研究。E-mail: youcitian@163.com

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引用该论文

You Citian,Chen Peichao,Ding Panfeng. Experimental Research on Single Mode-Multimode-Single Mode Fiber Structure in Security System[J]. Laser & Optoelectronics Progress, 2018, 55(6): 060603

游赐天,陈沛超,丁攀峰. 单模-多模-单模光纤结构在安防系统的实验研究[J]. 激光与光电子学进展, 2018, 55(6): 060603

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