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Sensitivity-enhanced intracavity-absorption acetylene sensor based on mode competition
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Paper Abstract

We propose a sensitivity-enhanced intracavity-absorption gas sensor based on the phenomenon of mode competition in the dual-wavelength ring fiber laser. The laser configuration possesses the sensing and reference wavelengths as 1530.372 nm and 1532.168 nm, respectively. When the hollow-core photonic crystal fiber (HC-PCF) is filled with 1000-ppmv acetylene, a sudden change on absorption intensity of more than 30 dB can be achieved by adjusting the optical loss in the laser cavities, resulting from the mode competition between the sensing and reference wavelengths. The minimum detectable acetylene concentration (MDAC) of 29.53 ppmv is obtained in experiment, one order of magnitude higher than former works.

Paper Details

Date Published: 16 February 2018
PDF: 6 pages
Proc. SPIE 10518, Laser Resonators, Microresonators, and Beam Control XX, 105180Y (16 February 2018); doi: 10.1117/12.2289064
Show Author Affiliations
Liangcheng Duan, Tianjin Univ. (China)
Haiwei Zhang, Tianjin Univ. (China)
Tianjin Univ. of Technology (China)
Xianchao Yang, Tianjin Univ. (China)
Wei Shi, Tianjin Univ. (China)
Ying Lu, Tianjin Univ. (China)
Lifang Xue, Tianjin Univ. of Technology (China)
Jianquan Yao, Tianjin Univ. (China)

Published in SPIE Proceedings Vol. 10518:
Laser Resonators, Microresonators, and Beam Control XX
Alexis V. Kudryashov; Alan H. Paxton; Vladimir S. Ilchenko, Editor(s)

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