Journal of Applied Optics, Volume. 42, Issue 5, 898(2021)

Edge filter temperature demodulation system based onarrayed wave-guide grating

Hongqiang LI1, Runjie WANG1、*, Meiling ZHANG2, Qian GAO2, Sai ZHANG1, Wenchao SONG1, Quanhua MAO1, Enbang LI3, and Daniel Prades Garcia Juan4
Author Affiliations
  • 1School of Electrical and Electronic Engineering, Tianjin Polytechnic University, Tianjin 300387, China
  • 2School of Textile Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China
  • 3Centre for Medical Radiation Physics, University of Wollongong, Wollongong NSW 2522, Australia
  • 4Department of Electronic and Biomedical Engineering, University of Barcelona, Barcelona E-08028, Spain
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    In order to overcome the large size and high price of the traditional arrayed wave-guide grating demodulation system, a demodulation scheme using a narrow-band light source as the input light source and adopting a combination of edge filter and arrayed wave-guide grating was proposed to realize the temperature demodulation experiment of fiber grating temperature sensor after packaging. Using the narrow-band light source as input, the edge filter method made the central wavelength shift of temperature sensor reflection spectrum correspond to the change in the output light intensity of demodulation optical path. The wavelength division multiplexing of arrayed wave-guide grating was used to realize the simultaneous measurement of multiple sensors, and the distributed measurement with multi-sensor and multi-channel was performed. The experimental results show that the wavelength demodulation range of the demodulation system is 1 545.30 nm~1 560.50 nm, the temperature range of 35 ℃~42 ℃ was detected, and the wavelength demodulation accuracy is ±5.34 pm. The temperature measurement error can reach to ±0.1 ℃.

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    Hongqiang LI, Runjie WANG, Meiling ZHANG, Qian GAO, Sai ZHANG, Wenchao SONG, Quanhua MAO, Enbang LI, Daniel Prades Garcia Juan. Edge filter temperature demodulation system based onarrayed wave-guide grating[J]. Journal of Applied Optics, 2021, 42(5): 898

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    Paper Information

    Category: OPTICAL METROLOGY AND MEASUREMENT

    Received: Apr. 6, 2021

    Accepted: --

    Published Online: Oct. 26, 2021

    The Author Email: WANG Runjie (1830091241@tiangong.edu.cn)

    DOI:10.5768/JAO202142.0503004

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