Research on distortion of HCN absorption spectrum in FBG demodulation system

Yuqing Li; Haibo Yang; Jianda Gu; Xiaorui Jiang; Jingyi Fu; Wenchao Ma; Na Xie; Jiaxin Chen; Song Guan

doi:10.1117/12.3016400

1 February 2024 Research on distortion of HCN absorption spectrum in FBG demodulation system

Yuqing Li, Haibo Yang, Jianda Gu, Xiaorui Jiang, Jingyi Fu, Wenchao Ma, Na Xie, Jiaxin Chen, Song Guan

Proceedings Volume 13068, Fifth International Conference on Optoelectronic Science and Materials (ICOSM 2023); 130681F (2024) https://doi.org/10.1117/12.3016400
Event: Fifth International Conference on Optoelectronic Science and Materials (ICOSM 2023), 2023, Hefei, China

Abstract

In the FBG demodulation system applying HCN absorption lines as wavelength reference, the output of ASE broadband light source is controlled by tunable F-P filter to provide scanning light for the whole demodulation system. However, due to the influence of the tunable F-P filter in the system, the HCN absorption lines are distorted, including broadening, shallowness and asymmetry, which affect the subsequent determination of peak position, thus reducing the demodulation. In this paper, the broadening, shallowness and asymmetric distortion of HCN absorption spectrum caused by F-P filter are studied and analyzed.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Yuqing Li, Haibo Yang, Jianda Gu, Xiaorui Jiang, Jingyi Fu, Wenchao Ma, Na Xie, Jiaxin Chen, and Song Guan "Research on distortion of HCN absorption spectrum in FBG demodulation system", Proc. SPIE 13068, Fifth International Conference on Optoelectronic Science and Materials (ICOSM 2023), 130681F (1 February 2024); https://doi.org/10.1117/12.3016400

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