光纤布拉格光栅
材料科学
双折射
温度测量
光学
光纤陀螺
光纤传感器
光纤
保偏光纤
光电子学
物理
量子力学
作者
Yuhui Liu,Wei‐Hao Lin,Fang Zhao,Xuming Zhang,Liyang Shao
出处
期刊:IEEE Photonics Journal
日期:2024-01-01
卷期号:: 1-8
标识
DOI:10.1109/jphot.2024.3351092
摘要
A flexible and stable optical fiber sensor based on the Sagnac loop is proposed and experimentally demonstrated for the measurement of salinity and temperature, simultaneously. The sensing unit consists of a tapered polarization maintaining fiber (tPMF) and a fiber Bragg grating (FBG) connected in series in the Sagnac loop. The temperature response comes from the high birefringence of PMF inside Sagnac loop, and the salinity response is enabled by the high-order modes excited in the tapered area of PMF. Besides, the FBG is for temperature compensation. We have succeeded in implementing dual-parameter measurements with the sensitivities of 0.356 nm/‰ for salinity and 0.616 nm/°C for temperature, respectively. The designed sensor has the potential for long-term monitoring of real ocean states.
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