Tapered multi-mode fiber temperature sensor based on simultaneous response of wavelength and intensity

Jia Zhenan;Duan Weiwei;Liu Yinggang;Zhang Jingle;Li Kang

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    Published By: Journal of Applied Optics

    CN 61-1171/O4

Journal of Applied Optics ›› 2017, Vol. 38 ›› Issue (2) : 331-335. DOI: 10.5768/JAO201738.0208001

Tapered multi-mode fiber temperature sensor based on simultaneous response of wavelength and intensity

  • Jia Zhenan1, Duan Weiwei1, Liu Yinggang1, Zhang Jingle1, Li Kang1
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Abstract

By combining ends of a multimode fiber with a length of 17 mm and single-mode fiber(SMF), multimode fiber is then subjected to a tapered treatment to obtain a tapered multimode fiber with a wavelength and intensity sensor. Temperature sensing characteristics of sensor in range of 30 ℃ ~ 80 ℃ were studied experimentally. Experimental results show that when ambient temperature changes, response sensitivity of sensor to temperature of interference trough near 1 542 nm can reach 0. 041 nm / ℃ and 0. 106 dB / ℃ respectively, and there is a good linear relationship between wavelength response and intensity response of sensor interference fringe. Based on this linear relationship between sensor wavelength response and intensity response, phase demodulation of interferometric fiber optic sensor can be realized by detecting intensity of sensor signal. This method provides a new idea for sensing and demodulating signal value.

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optical fiber temperature sensor / temperature / intensity / tapered MMF / wavelength

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Jia Zhenan, Duan Weiwei, Liu Yinggang, Zhang Jingle, Li Kang. Tapered multi-mode fiber temperature sensor based on simultaneous response of wavelength and intensity. Journal of Applied Optics. 2017, 38(2): 331-335 https://doi.org/10.5768/JAO201738.0208001

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