Cascaded vernier effect optic fiber temperature sensor with DSHF-Based MZI and FPI

Yuan, Yu-long; Tong, Rui-jie; Xing, Bin; Wu, Shu-chang; Zheng, Hao-nan; Zhao, Yong

doi:10.1016/j.measurement.2024.114625

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Measurement

2024

DOI: 10.1016/j.measurement.2024.114625

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Cascaded vernier effect optic fiber temperature sensor with DSHF-Based MZI and FPI

Yu-long Yuan,

Rui-jie Tong,

Bin Xing

et al.

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2024

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Fiber optic relative humidity and temperature sensor with the cascaded Vernier effect based on the C-shaped cavity structure

Zhao,

Song,

et al. 2024

Opt. Express

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The water-absorbent sensing film, coated on the surface of traditional optical fiber humidity sensors, often suffers from detachment issues. In this paper, we present what we believe to be a new fiber-optic cascaded Fabry-Perot interferometer sensor for detecting relative humidity (RH) and temperature, without the need for sophisticated instrumentation. The sensing structure comprises two sections of single-mode optical fibers and a C-shaped cavity between them. The C-shaped cavity is created by grinding the side of a hollow-core fiber with fiber optic abrasive paper. The Vernier effect arises from the cascaded interaction between the C-shaped cavity filled with ultraviolet optical glue (NOA61) and the subsequent single-mode fiber pigtail. The sensor exhibits a high RH sensitivity of 0.248 nm/%RH (35-95%RH) and an RH resolution of up to 0.08%RH. It also has high-temperature sensitivities of -1.091 nm/°C (25 - 65°C). Furthermore, simultaneous measurement of RH and temperature is achieved by establishing a dual parameter matrix, and the sensor's response time and recovery time for RH and temperature are within 300s. Therefore, this work provides a simple and cost-effective manufacturing process and the proposed RH and temperature sensor features a compact size, strong environmental adaptability, and significant potential for practical applications.

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Fiber optic relative humidity and temperature sensor with the cascaded Vernier effect based on the C-shaped cavity structure

Zhao,

Song,

et al. 2024

Opt. Express

View full text Add to dashboard Cite

show abstract

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Cascaded vernier effect optic fiber temperature sensor with DSHF-Based MZI and FPI

Cited by 1 publication

References 26 publications

Fiber optic relative humidity and temperature sensor with the cascaded Vernier effect based on the C-shaped cavity structure

Fiber optic relative humidity and temperature sensor with the cascaded Vernier effect based on the C-shaped cavity structure

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