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| 基于长周期光纤光栅嵌入型Sagnac环光谱的折射率测量 | |
| 作者姓名： | Kang J Dong XY Zhao CL Zhang ZX Jin SZ |
| 作者单位： | 1. 中国计量学院光电子技术研究所,浙江,杭州,310018;上海理工大学光电信息与计算机工程学院,上海,200093 2. 中国计量学院光电子技术研究所,浙江,杭州,310018 3. 上海理工大学光电信息与计算机工程学院,上海,200093 |
| 基金项目： | 国家重点基础研究计划(973计划)项目,浙江省科技厅公益技术应用研究项目,浙江省自然科学基金项目 |
| 摘 要： | 将长周期光纤光栅(LPG)和光纤Sagnac环相结合,实现了折射率和温度的同时测量.首先利用二氧化碳激光器在保偏光纤上制作了长周期光纤光栅(PM-LPG),然后把该PM-LPG和普通单模光纤耦合器组成Sagnac环,作为传感单元.实验选择其某一透射峰作为测试对象,其波长随温度变化,强度随折射率变化,因此可实现两个参量的... |
| 关 键 词： | 光纤Sagnac环 保偏光纤 长周期光纤光栅 折射率传感器 |
Measurement of refractive index with a PM-LPG based Sagnac loop sensor |
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| Kang J,Dong XY,Zhao CL,Zhang ZX,Jin SZ.Measurement of refractive index with a PM-LPG based Sagnac loop sensor[J].Spectroscopy and Spectral Analysis,2011,31(4):902-905. | |
| Authors: | Kang Juan Dong Xin-Yong Zhao Chun-Liu Zhang Zai-Xuan Jin Shang-Zhong |
| Institution: | Institute of Optoelectronic Technology, China Jiliang University, Hangzhou 310018, China. kangjuan@cjlu.edu.cn |
| Abstract: | By inscribing a long-period fiber grating (LPG) on a polarization-maintaining fiber (PMF), a fiber Sagnac loop sensor for simultaneous measurement of refractive index and temperature has been proposed and demonstrated. The LPG was fabricated on the PMF by using a CO2 laser, and then inserted into a fiber loop formed by using a normal single-mode fiber coupler. One of the transmission minimum of the Sagnac loop sensor was measured, whose wavelength varied with temperature and the intensity changed with refractive index. Temperature sensitivity of -0.654 nm x degrees C(-1) and refractive sensitivity of 49.9 dB x RIU(-1) have been achieved. The sensor system shows advantages of small size and low cost, and owns a good application prospect. |
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