Intra-cavity absorption gas sensing network based on hybrid DWDM and TDM

Liangcheng Duan; Wenli Liu; Zhixiong Hu; Guangyao Wang; Haiwei Zhang; Ying Lu

doi:10.1117/12.2607121

24 November 2021 Intra-cavity absorption gas sensing network based on hybrid DWDM and TDM

Liangcheng Duan, Wenli Liu, Zhixiong Hu, Guangyao Wang, Haiwei Zhang, Ying Lu

Proceedings Volume 12065, AOPC 2021: Optical Sensing and Imaging Technology; 120653S (2021) https://doi.org/10.1117/12.2607121
Event: Applied Optics and Photonics China 2021, 2021, Beijing, China

Abstract

A multiplexed gas sensing network based on hollow-core photonic crystal fiber (HC-PCF) and active intra-cavity absorption spectrometry is designed and demonstrated experimentally. Sensing channels are extended to eight by using hybrid dense wavelength division multiplexing (DWDM) and time division multiplexing (TDM). What’s more, wavelength scanning technique combined with voltage gradient method are adopted in the designed sensing network, which improves the sensing efficiency at least five times when comparing with the whole scan. In experiment, by recording and analyzing the laser output intensity at acetylene absorption peaks of 1528.01 nm and 1530.37 nm, the minimum detection limit (MDL) of 30.16 ppmv and 26.28 ppmv are achieved, respectively. Therefore, the designed gas sensing network can realize detection of low-concentration gas with high capacity and efficiency.

Citation Download Citation

Liangcheng Duan, Wenli Liu, Zhixiong Hu, Guangyao Wang, Haiwei Zhang, and Ying Lu "Intra-cavity absorption gas sensing network based on hybrid DWDM and TDM", Proc. SPIE 12065, AOPC 2021: Optical Sensing and Imaging Technology, 120653S (24 November 2021); https://doi.org/10.1117/12.2607121

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