A novel optical fiber Fabry-Perot sensor based on hollow core photonic crystal fiber for refractive index sensing
Refractive index (RI) sensing of liquids is significant for chemical and biochemical applications in industry,environment and food safety monitoring, etc.Here we propose a novel RI sensor based on a hollow core photonic crystal fiber (HC-PCF) Fabry-Perot interferometer (FPI).This FPI is formed by simply splicing both ends of a short section of HC-PCF with SMFs with a common fusion splicer using a manual program, and cleaving the SMF pigtail to a proper length.The reflected interference spectrum of the FP sensor depends on the RI of the external medium.By measuring the fringe contrast of the interference pattern, the RI of the liquid can be detected.Experiments show that it has a good linearity and high resolution.By measuring the maximum fringe contrast of the sensor in sucrose solutions with different RI (1.33~1.44), the RI sensitivity obtained is 140dB/RIU, and for our interrogator the RI resolution is 7.14× 10-6 RIU.And due to the temperature insensitivity of HC-PCF, this sensor can provide temperature-independent measurement.For many desirable advantages such as compact, easy fabrication, low-cost, high sensitivity, real-time response, low temperature cross-sensitivity, and suitability for remote measurement, it has extensive application prospect.
optical fiber sensor refractive index sensing Fabry-Perot interferometer Hollow-core photonic crystal fiber
Xiaohui Liu Mingshun Jiang Qingmei Sui Shuyang Luo
School of Control Science and Engineering, Shandong University, Jinan 250061, Shandong,China
国内会议
光纤和光电子传感器及其安全应用国际会议(OFSIS2015)
济南
英文
211-217
2015-01-20（万方平台首次上网日期，不代表论文的发表时间）