Wu Chuang, Guan Bai-Ou, Lu Chao, Tam Hwa-Yaw
Photonics Research Centre, Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China.
Opt Express. 2011 Oct 10;19(21):20003-8. doi: 10.1364/OE.19.020003.
We proposed and experimentally demonstrated a highly sensitive salinity sensor using a polyimide-coated Hi-Bi photonic crystal fiber Sagnac interferometer based on the coating swelling induced radial pressure. This is the first time to exploit fiber coating induced pressure effect for salinity sensing. The achieved salinity sensitivity is 0.742 nm/(mol/L), which is 45 times more sensitive than that of a polyimide-coated fiber Bragg grating. A bare fiber Bragg grating is incorporated into the fiber loop for temperature compensation.
我们提出并通过实验证明了一种基于涂层膨胀引起的径向压力的聚酰亚胺涂层高双折射光子晶体光纤萨格纳克干涉仪高灵敏度盐度传感器。这是首次利用光纤涂层引起的压力效应进行盐度传感。所实现的盐度灵敏度为0.742纳米/（摩尔/升），比聚酰亚胺涂层光纤布拉格光栅的灵敏度高45倍。在光纤环中加入裸光纤布拉格光栅进行温度补偿。
