Zhang Ya-Nan, Li Like, Zhao Jincheng, Zhao Yong
College of Information Science and Engineering, Northeastern University, Shenyang 110819, China.
State Key Laboratory of Synthetical Automation for Process Industries, Shenyang 110819, China.
Fundam Res. 2021 Nov 30;2(2):296-302. doi: 10.1016/j.fmre.2021.11.023. eCollection 2022 Mar.
This paper proposes a highly sensitive, compact, and low-cost optical fiber salinity sensor based on the Mach-Zehnder interferometer. The sensor is constructed using a single mode fiber (SMF) - no-core fiber - double-C fiber (DCF) - NCF-SMF structure, with the DCF prepared by etching the dual side-hole fiber with HF acid. The DCF's large-size exposed microfluidic channels solve the previous microstructured optical fiber's challenging liquid filling and replacement problems. Theoretical simulations and experiments demonstrate that the sensor is suitable for high-sensitivity salinity measurement. The sensor exhibits a high salinity sensitivity of -2.26 nm/‰ in the salinity range of 10‰-50‰, as demonstrated by the experimental results. Additionally, the sensor exhibits some fascinating characteristics, including high repeatability, hysteresis, reversibility, and stability.
本文提出了一种基于马赫-曾德尔干涉仪的高灵敏度、紧凑型且低成本的光纤盐度传感器。该传感器采用单模光纤（SMF）-无芯光纤-双C光纤（DCF）-NCF-SMF结构构建，其中DCF通过用氢氟酸蚀刻双侧孔光纤制备。DCF的大尺寸暴露微流体通道解决了先前微结构光纤具有挑战性的液体填充和更换问题。理论模拟和实验表明，该传感器适用于高灵敏度盐度测量。实验结果表明，该传感器在10‰-50‰的盐度范围内具有-2.26 nm/‰的高盐度灵敏度。此外，该传感器还具有一些引人入胜的特性，包括高重复性、滞后性、可逆性和稳定性。
