摘要
文章简要介绍了双模光纤中存在的传输模式,讨论了椭圆芯双模光纤模斑稳定性。建立在光纤中传输模场的基础上,研究了两模间干涉特性和传感特性,指出了远场两瓣光斑的动态变化规律。针对不同的扰动,重点讨论了轴向应变、径向应变和温度变化对模间相位差的影响,分析了基于逆压电效应的双模光纤电压传感器结构和原理,以及信号的获取。
Introduce the modes in dual-mode fibers, discuss the stability of mode patterns in elliptical-core dual-mode fiber. Based on the transmitted field, the characteristie of interference and sensing between two modes is investigated, and point out the disciplinarian of far field two-lobe radiation patterns. According to the various perturbations, the influences of the axial strain, radial strain and temperature change on the phase difference are discussed. Analyze the structure and principle of fiber voltage sensor that is based on converse piezoelectric effect and the signal acquisition.
出处
《电测与仪表》
北大核心
2006年第5期13-17,共5页
Electrical Measurement & Instrumentation
基金
国家自然科学基金资助项目(编号50477001)
关键词
双模光纤
光纤传感
相位差
扰动
dual-mode fiber
fiber sensor
phase difference
perturbation
