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High-sensitivity salinity sensor based on optical microfiber coil resonator

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journal contribution
posted on 2019-01-14, 15:58 authored by Yu Yin, Shi Li, Jing Ren, Gerald Farrell, ELFED LEWISELFED LEWIS, Pengfei Wang
A simple, compact, and high-sensitivity optical sensor for salinity measurement is reported based on an optical microfiber coil resonator (MCR). The MCR is manufactured by initially wrapping microfiber on a polymethylmethacrylate (PMMA) rod, which is dissolved to leave a hollow cylindrical fluidic channel within the coil for measurement. Based on the light propagation through the MCR, the device’s spectrum moves to long wavelengths with increased salinity in the fluid. The MCR device’s sensitivity can reach up to 15.587 nm/% with a resolution of 1.28 × 10-3%. It is also confirmed that the temperature dependence is 79.87 pm/°C, which results from the strong thermal-expansion coefficient of the low refractive index epoxy. The experimental results indicate that the device can be widely used as a high sensitivity salinity sensor in water and other liquids due to its stability, compactness, electromagnetic immunity, and high sensitivity.

Funding

Tensor network algorithms for two-dimensional strongly correlated lattice systems

Deutsche Forschungsgemeinschaft

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History

Publication

Optics Express;26 (26) pp. 34633-34640

Publisher

Optical Society of America

Note

peer-reviewed

Other Funding information

National Natural Science Foundation of China, Natural Science Foundation of Heilongjiang

Rights

This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website:https://doi.org/10.1364/OE.26.034633 . Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

Language

English

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