Temperature sensing based on phase-to-intensity modulation conversion in fiber Bragg grating

Yushuang Zhu; Lin Gui; Yaoyu Cao; Yang Zhang; Dan Lu; Guangcan Chen

doi:10.1117/12.2506133

15 November 2018 Temperature sensing based on phase-to-intensity modulation conversion in fiber Bragg grating

Yushuang Zhu, Lin Gui, Yaoyu Cao, Yang Zhang, Dan Lu, Guangcan Chen

Proceedings Volume 10964, Tenth International Conference on Information Optics and Photonics; 109644M (2018) https://doi.org/10.1117/12.2506133
Event: Tenth International Conference on Information Optics and Photonics (CIOP 2018), 2018, Beijing, China

Abstract

In this paper, a method of temperature sensing based on microwave signal generation with fiber Bragg grating (FBG) as a frequency discriminator is proposed and experimentally demonstrated. According to the proposed approach, the optical carrier frequency is placed at the slope of the phase response of the FBG. The measure and to the phase of microwave signal generated by the frequency discriminator is mapped through an electrical spectrum analyzer. The proposal can describe the change in the flat area of the amplitude response, which improves the sensing resolution of the temperature near the center wavelength. Higher precision can be distinguished from the slope of the phase response. A result that the sensor responds to temperature with a sensitivity of 5.2dB/°C is achieved.

Citation Download Citation

Yushuang Zhu, Lin Gui, Yaoyu Cao, Yang Zhang, Dan Lu, and Guangcan Chen "Temperature sensing based on phase-to-intensity modulation conversion in fiber Bragg grating", Proc. SPIE 10964, Tenth International Conference on Information Optics and Photonics, 109644M (15 November 2018); https://doi.org/10.1117/12.2506133

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