Axial Micro-Strain Sensor Based on FM-FBG via Dual-Mode ML-FMF in Sensor Networks

• 作者: Jingcong Li Pengyu Zhang Wenqiang Liu Xiao Liang Zhaoxin Geng
• 来源期刊: 电脑和通信(英文)
• 学科: 工学
• 关键词: Micro-Strain Sensor ML-FMF Dual-Mode Fiber FM-FBG Sensor Network
• 年，卷（期）: 2020,（10）
• 页码范围: 1-6
• 页数: 6页
• 分类号: TP2

摘要

<div style="text-align:justify;"> An in-fiber axial micro-strain sensor based on a Few Mode Fiber Bragg Grating (FM-FBG) is proposed and experimentally characterized. This FM-FBG is in inscribed in a multi-layer few-mode fiber (ML-FMF), and could acquire the change of the axial strain along fibers, which depends on the transmission dips. On account of the distinct dual-mode property, a good stability of this sensor is realized. The two transmission dips could have the different sensing behaviors. Both the propagation characteristics and operation principle of such a sensor are demonstrated in detail. High sensitivity of the FM-FBG, ~4 pm/με and ~4.5 pm/με within the range of 0 με - 1456 με, is experimentally achieved. FM-FBGs could be easily scattered along one fiber. So this sensor may have a great potential of being used in sensor networks. </div>