Edge filter temperature demodulation system based onarrayed wave-guide grating

LI Hongqiang; WANG Runjie; ZHANG Meiling; GAO Qian; ZHANG Sai; SONG Wenchao; MAO Quanhua; LI Enbang; Juan Daniel Prades Garcia

doi:10.5768/JAO202142.0503004

Journal of Applied Optics > 2021 > 42(5): 898-905. > DOI: 10.5768/JAO202142.0503004

LI Hongqiang, WANG Runjie, ZHANG Meiling, GAO Qian, ZHANG Sai, SONG Wenchao, MAO Quanhua, LI Enbang, Juan Daniel Prades Garcia. Edge filter temperature demodulation system based onarrayed wave-guide grating[J]. Journal of Applied Optics, 2021, 42(5): 898-905. DOI: 10.5768/JAO202142.0503004

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Edge filter temperature demodulation system based onarrayed wave-guide grating

1.
School of Electrical and Electronic Engineering, Tianjin Polytechnic University, Tianjin 300387, China
2.
School of Textile Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China
3.
Centre for Medical Radiation Physics, University of Wollongong, Wollongong NSW 2522, Australia
4.
Department of Electronic and Biomedical Engineering, University of Barcelona, Barcelona E-08028, Spain

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Received Date: April 05, 2021
Revised Date: May 24, 2021
Available Online: July 22, 2021

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Abstract

Abstract

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 ℃.
- fiber grating demodulation,
- arrayed wave-guide grating,
- temperature sensing,
- edge demodulation

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References (20)

References

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Edge filter temperature demodulation system based onarrayed wave-guide grating