Double-range near-infrared acetylene detection using a dual spot-ring Herriott cell (DSR-HC) | Zendy

Ming Dong | Zendy; Chuantao Zheng | Zendy; Dan Yao | Zendy; Guoqiang Zhong | Zendy; Shuzhuo Miao | Zendy; Weilin Ye | Zendy; Yiding Wang | Zendy; Frank K. Tittel | Zendy

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Double-range near-infrared acetylene detection using a dual spot-ring Herriott cell (DSR-HC)

Author(s) -

Ming Dong,

Chuantao Zheng,

Dan Yao,

Guoqiang Zhong,

Shuzhuo Miao,

Weilin Ye,

Yiding Wang,

Frank K. Tittel

Publication year - 2018

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.26.012081

Subject(s) - materials science , optics , acetylene , absorption (acoustics) , absorption spectroscopy , laser , path length , spectroscopy , detector , optical path , optoelectronics , physics , chemistry , organic chemistry , quantum mechanics

Design and fabrication of a dual spot-ring Herriott cell (DSR-HC) were proposed. The sealed Herriott cell with a dimensional size of 5.5 cm × 9.2 cm × 32.1 cm, possessed two input/output coupling holes leading to two absorption path lengths of ~20 m and ~6 m, respectively. An acetylene (C2H2) sensor system with a double-range was developed using the DSR-HC and wavelength modulation spectroscopy (WMS) technique. A near-infrared distributed feedback (DFB) laser was employed for targeting a C2H2 absorption line at 6521.2 cm-1. C2H2 concentration measurements were carried out by modulating the laser at a 5 kHz frequency and demodulating the detector signal with LabVIEW software. An Allan-Werle deviation analysis indicated that the limit of detection (LoD) for the two absorption path lengths of 20 m and 6 m are 7.9 parts-per-million in volume (ppmv) and 4.0 ppmv, respectively. The DSR-HC concept can be used to fabricate similar cells for single-gas detection requiring two different detection ranges as well as for dual-gas detection requiring different absorption path lengths.

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