Temperature insensitive fiber optical refractive index probe with large dynamic range at 1,550 nm
Temperature insensitive fiber optical refractive index probe with large dynamic range at 1,550 nm
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对温度不敏感的光纤折射率探头，在 1,550 nm 处具有大动态范围
DOI：
10.1016/j.sna.2020.112102
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发表时间：
2020-09-01
影响因子：
4.6
通讯作者：
Jun, Martin Byung-Guk
中科院分区：
文献类型：
--
作者：
Zhou, Fengfeng;Su, Huaizhi;Jun, Martin Byung-Guk
本文介绍了一种测量液体折射率的光纤传感探头，其温度串扰可以忽略不计。该传感器采用飞秒激光微加工技术制作。当环境折射率在1.3166 ~ 1.4346范围内变化时，灵敏度为885.437 ~ 1067.525nm/RIU。测量了水的折射率随温度的变化关系，并与理论结果进行了比较。在水中检测到约4摄氏度的最大折射率。还在1550 nm处测量了乙醇、甲醇和丙酮的折射率对温度的依赖性。对甲醇的测量结果与文献报道的结果吻合较好，但与另一项研究中估算的热光系数存在显著差异。(C)2020 Elsevier B. V.保留所有权利。
Presented in this paper is a fiber optic sensing probe that measures the refractive index of liquid with negligible temperature crosstalk. This sensor was fabricated by femtosecond laser micro machining. The sensitivity is 885.437 to 1,067.525 nm/RIU when the ambient refractive index varies from 1.3166 to 1.4346 at 1550 nm. The refractive index dependence on temperature of water was measured and compared with the theoretical result. A maximum refractive index at around 4 degrees C was detected in water. The refractive index dependence on temperature of ethanol, methanol, and acetone was also measured at 1550 nm. The result of methanol given by our measurement agrees well with the previously published literature, but a significant difference was found with the estimated thermo-optic coefficient in another research. (C) 2020 Elsevier B.V. All rights reserved.