A fiber Bragg grating demodulation system based on VCSEL laser and utilizing acetylene gas reference

Zegong Wu; Shijie Deng; Guangxian Jin; Yanong Ning; Zhengjie Li; Lu Cao; Tongyu Liu

doi:10.1117/12.3005938

18 December 2023 A fiber Bragg grating demodulation system based on VCSEL laser and utilizing acetylene gas reference

Zegong Wu, Shijie Deng, Guangxian Jin, Yanong Ning, Zhengjie Li, Lu Cao, Tongyu Liu

Proceedings Volume 12968, AOPC 2023: Optic Fiber Gyro ; 129680Z (2023) https://doi.org/10.1117/12.3005938
Event: Applied Optics and Photonics China 2023 (AOPC2023), 2023, Beijing, China

Abstract

This paper proposes a low-power, wide demodulation range solution for Fiber Bragg Gratings (FBG) based on voltage and current dual-wavelength tuning of VCSEL lasers. The paper first explains the principle of the demodulation system and then discusses the impact of driving voltage, current, and temperature on the emission wavelength of the laser. By investigating the wavelength scanning overlap range of the laser at different temperatures, the wavelength range of the FBG sensor is determined to be 4.5nm. The experimental results show that the demodulation system exhibits good wavelength repeatability, with the wavelength repeatability of all three channels within ±3pm. Furthermore, the overall power consumption of the system is only around 189mW, indicating that the demodulation system possesses the low power consumption characteristic and can be powered by portable power sources.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Zegong Wu, Shijie Deng, Guangxian Jin, Yanong Ning, Zhengjie Li, Lu Cao, and Tongyu Liu "A fiber Bragg grating demodulation system based on VCSEL laser and utilizing acetylene gas reference", Proc. SPIE 12968, AOPC 2023: Optic Fiber Gyro , 129680Z (18 December 2023); https://doi.org/10.1117/12.3005938

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KEYWORDS

Demodulation

Emission wavelengths

Fiber Bragg gratings

Vertical cavity surface emitting lasers

Bragg wavelengths

Fiber lasers

Power consumption

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