A polarization-maintaining fiber loop mirror based sensor for liquid refractive index absolute measurement

作者：Zhong, Chuan; Shen, Changyu^*; You, Yang; Chu, Jinlei; Zou, Xin; Dong, Xinyong; Jin, Yongxing; Wang, Jianfeng

来源：Sensors and Actuators B: Chemical , 2012, 168: 360-364.

DOI：10.1016/j.snb.2012.04.035

• Liquid refractive index sensor
• Absolute measurement
• Polarization-maintaining fiber
• Fiber loop mirror

A fiber sensor based on polarization-maintaining fiber loop mirror (FLM) for liquid refractive index absolute measurement is described. Two sections of polarization maintaining fibers (PMFs) with different length were inserted into the FLM. One section of PMF was chemical etched for liquid refractive index measurement and the other one for reference. Liquid refractive index absolute measurement can be obtained by detecting the interference wavelength difference corresponding to the two sections of PMFs. High sensitivity of 63.82 +/- 0.04 nm/RIU (refractive index unit) and a resolution of 3.14 x 10(-4) RIU were obtained for the proposed liquid refractive index sensor.

• 出版日期2012-6-20
• 单位华中科技大学; 中国计量大学