JING Ning1,2
（1. Shanxi Provincial Research Center for Opto-Electronic Information ＆ Instrument Engineering Technology, North University of China, Taiyuan 030051, China； 2. School of Information and Communication Engineering, North University of China, Taiyuan 030051, China）
Abstract： This paper investigated the continuous measurement of a refractive index (RI) sensor based on macrobending micro-optical plastic fiber (m-POF). The sensing properties of the RI sensor depend on the structure parameter, which is the ratio of macrobending radius of m-POF to the radius of fiber itself. The ratio changes with the measurement time increasing because of the water absorption, which introduces an maximum measurement deviation of 7.3×10-5 RIU when the immersion time exceeds 40 h. This work indicates that for the sensors based on POF, the measurement time must be taken into consideration for continuous measurement.
Key words： plastic optical fiber (POF); water absorption; continuous measurement
CLD number： TN253Document code： A
Article ID： 1674-8042（2016）02-0103-03 doi： 10.3969/j.issn.1674-8042.2016.02.001
References
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［3］JING Ning, TENG Chuan-xin, ZHENG Jie, et al. Refractive index sensing with a macro-bending structure of the multimode micro plastic optical fiber. In: Asia Communications and Photonics Conference, Optical Society of America, 2013.
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塑料光纤折射率计连续测量研究
景宁1,2
（1. 中北大学 山西省光电信息与仪器工程技术研究中心， 山西 太原 030051； 2. 中北大学 信息与通信工程学院， 山西 太原 030051）
摘要:本文对基于宏弯曲塑料光纤的折射率计的连续测量特性进行了研究。 宏弯曲结构的曲率半径与光纤半径的比值决定了该折射率计的工作特性。 由于聚合物材料具有一定的吸水性， 导致该折射率计在连续工作时其结构参数发生改变。 实验表明， 浸没时间超过40 h， 折射率计产生了7.3×10-5 RIU的测量偏差。这项研究指出， 基于塑料光纤的液体传感器， 在连续工作时必须对其吸水性问题加以考虑。
关键词:塑料光纤； 吸水性； 连续测量
引用格式：JING Ning. Plastic optical fiber refractometer for continuous refractive index measurement. Journal of Measurement Science and Instrumentation, 2016, 7(2)： 103-105. ［doi： 10.3969／j.issn.1674-8042.2016.02.001］
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