Temperature Compensated Refractometer Based on a Cascaded SMS/LPFG Fiber Structure
Temperature Compensated Refractometer Based on a Cascaded SMS/LPFG Fiber Structure
复制标题
DOI：
10.1016/j.snb.2014.03.062
复制
发表时间：
2014-07
影响因子：
8.4
通讯作者：
Jie Huang;Xinwei Lan;A. Kaur;Hanzheng Wang;Lei Yuan;H. Xiao
中科院分区：
文献类型：
--
作者：
Jie Huang;Xinwei Lan;A. Kaur;Hanzheng Wang;Lei Yuan;H. Xiao
报道了一种具有温度补偿能力的折射率测量混合光纤结构。该结构由co2激光诱导长周期光纤光栅（LPFG）和一段单模-多模-单模（SMS）光纤结构组成。LPFG用作折光计，使用简单的SMS光纤结构，带有温度补偿器。研究了该装置的传感机理，并进行了实验验证。SMS结构对环境温度变化敏感，而LPFG对环境温度变化敏感。建立了一个灵敏度矩阵来补偿温度- ri串扰。实验验证了该传感器同时测量温度和RI的能力。
A hybrid optical fiber structure for refractive index (RI) measurement with the temperature compensation capability is reported. The structure consists of a CO2laser-induced long period fiber grating (LPFG) and a section of single mode–multimode–single mode (SMS) fiber structure. The LPFG serves as a refractometer with a temperature compensator using a simple SMS fiber structure. The sensing mechanism of this device has been investigated and experimentally demonstrated. The SMS structure was insensitive towards the change in the ambient RI but was sensitive towards the changes in the ambient temperature whereas the LPFG was sensitive towards both. A sensitivity matrix was built to compensate the temperature-RI crosstalk. The capability of simultaneous measurement of temperature and RI of the sensor was experimentally validated.