Dispersion Effects of High-Order-Mode Fiber on Temperature and Axial Strain Discrimination

• 作者: Jia SONG Liang CHEN Ping LU Xiaopeng DONG Xiaoyi BAO Yanping XU
• 来源期刊: 光子传感器:英文版
• 学科: 工学
• 关键词: 轴向应变 温度变化 色散效应 光纤 高阶模 纤维结构 空间频率域 傅里叶变换
• 年，卷（期）: 2015,（3）
• 页码范围: 224-234
• 页数: 11页
• 分类号: TN929.11
• 语种: 中文

摘要

A new approach utilizing effects of dispersion in the high-order-mode fibers (HOMFs) to effectively discriminate changes in environmental temperature and axial strain is proposed and experimentally demonstrated. Experimental characterization of a HOMF-based fiber modal interferometer with a sandwich fiber structure exhibits excellent agreements with numerical simulation results. A Fourier transform method of interferometry in the spatial frequency domain is adopted to distinguish mode coupling between different core-guided modes. Distinct phase sensitivities of multiple dispersion peaks are extracted by employing a novel phase demodulation scheme to realize dual-parameter sensing.