Dual-core photonic crystal fiber temperature sensor based on vernier effect

Guowen AN; Lizhi WANG; Pinggang JIA; Chengrui ZHAI; Yanjun ZHANG; Jianhui SU; Fengtong ZHU; Lei LIU

doi:10.5768/JAO202243.0308002

Journals >Journal of Applied Optics >Volume 43 >Issue 3 >Page 551 > Article

Journal of Applied Optics
Vol. 43, Issue 3, 551 (2022)

Dual-core photonic crystal fiber temperature sensor based on vernier effect

Guowen AN, Lizhi WANG, Pinggang JIA, Chengrui ZHAI..., Yanjun ZHANG^*, Jianhui SU, Fengtong ZHU and Lei LIU|Show fewer author(s)

Author Affiliations

State Key Laboratory of Dynamic Testing Technology, North University of China, Taiyuan 030051, China

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DOI: 10.5768/JAO202243.0308002 Cite this Article

Guowen AN, Lizhi WANG, Pinggang JIA, Chengrui ZHAI, Yanjun ZHANG, Jianhui SU, Fengtong ZHU, Lei LIU. Dual-core photonic crystal fiber temperature sensor based on vernier effect[J]. Journal of Applied Optics, 2022, 43(3): 551 Copy Citation Text

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Abstract

A high-sensitivity temperature sensor based on dual-core fiber coupling effect and vernier effect was proposed. The sensor was composed of two fibers which with a certain length difference, they were dual-core photonic crystal fiber and single mode fiber. The vernier effect was achieved by dual-core photonic crystal fiber through the cascade, and in the meantime the temperature sensing was achieved by filling the pores with ethanol in the middle of the fiber core. The simulation results show that the average temperature sensitivity of -20.37 nm/℃ of the temperature sensor can be achieved in the temperature range of 35℃~45℃. Compared with the sensor which only depends on the energy coupling effect of dual-core photonic crystal fiber, the temperature detection sensitivity of the proposed sensor is 10 times higher.

Keywords

coupled mode theory dual-core photonic crystal fiber fiber temperature sensors vernier effect

\begin{aligned} n_{silica}^{2} - 1 = & \frac{0 .696 166 3 λ^{2}}{λ^{2} - 0 .068 404 3^{2}} + \\ \frac{0 .407 942 6 λ^{2}}{λ^{2} - 0 .116 241 4^{2}} + \frac{0 .897 479 4 λ^{2}}{λ^{2} - 9 .896 16 1^{2}} \end{aligned}

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$ {n_{{\text{ethanol}}}} = \sqrt {{\text{1 + }}\frac{{{\text{0}}{\text{.016 5}}{\lambda ^{\text{2}}}}}{{{\lambda ^{\text{2}}} - {\text{9}}{\text{.08}}}}{\text{ + }}\frac{{{\text{0}}{\text{.826 8}}{\lambda ^{\text{2}}}}}{{{\lambda ^{\text{2}}} - {\text{0}}{\text{.010 39}}}}} - \alpha \left( T - {{\text{20}}} \right) $

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