中国激光, 2010, 37 (1): 171, 网络出版: 2010-01-16
基于空芯光子晶体光纤的全光纤法布里珀罗干涉式加速度传感器
Accelerometer Based on All-Fiber Fabry-Perot Interferometer Formed by Hollow-Core Photonic Crystal Fiber
传感器 光纤传感 加速度传感器 光子晶体光纤 法布里珀罗干涉仪 悬臂梁 sensors optical fiber sensors accelerometer photonic crystal fiber Fabry-Perot interferometer cantilever
摘要
研究了一种基于悬臂梁结构的光纤法布里珀罗干涉式加速度传感器,光纤法布里珀罗腔是用电弧放电熔接方法将空芯光子晶体光纤(HCPCF)熔接在两根普通通信单模光纤中间而构成。这种法布里珀罗干涉结构对应变敏感,而对温度和弯曲不敏感。理论推导了悬臂梁自由端扰度与这种法布里珀罗干涉腔的腔长、干涉光强,以及光电探测电压之间的关系,得到了简化的加速度计算公式。实验证明这种结构测量加速度的可行性,在实验的基础上理论推导出这种系统测量加速度的分辨率约为8.42×10-7 g,灵敏度为0.3386 V/g,提出了这种系统的进一步优化方法。
Abstract
All-fiber Fabry-Perot accelerometer based on cantilever structure is investigated. The Fabry-Perot structure is formed by hollow core photonic crystal fibers (HCPCF) and normal single mode fiber by using simple cleaving and splicing methods. Such kind of Fabry-Perot sensing structure is sensitive to strain,but is non-sensitive to temperature and bending. We analyze the relationship between the cavity length of HCPCF Fabry-Perot and light intensity,photoelectric detector voltage and the eccentricity of the free end of cantilever. Finally,we get the simple theoretical formula of computing acceleration. Experimental results show that this kind of Fabry-Perot can be used to measure acceleration,the resolution of the measuring system is about 8.42×10-7 g,and the sensitivity is 0.3386 V/g.
柯涛, 朱涛, 饶云江, 徐敏, 史翠华. 基于空芯光子晶体光纤的全光纤法布里珀罗干涉式加速度传感器[J]. 中国激光, 2010, 37(1): 171. Ke Tao, Zhu Tao, Rao Yunjiang, Xu Min, Shi Cuihua. Accelerometer Based on All-Fiber Fabry-Perot Interferometer Formed by Hollow-Core Photonic Crystal Fiber[J]. Chinese Journal of Lasers, 2010, 37(1): 171.