Quartz enhanced photoacoustic H2S gas sensor based on a fiber-amplifier source and a custom tuning fork with large prong spacing | Zendy

Hongpeng Wu | Zendy; Angelo Sampaolo | Zendy; Lei Dong | Zendy; Pietro Patimisco | Zendy; Xiaoli Liu | Zendy; Huadan Zheng | Zendy; Xukun Yin | Zendy; Weiguang Ma | Zendy; Lei Zhang | Zendy; Wangbao Yin | Zendy; Vincenzo Spagnolo | Zendy; Suotang Jia | Zendy; Frank K. Tittel | Zendy

Open Access

Quartz enhanced photoacoustic H2S gas sensor based on a fiber-amplifier source and a custom tuning fork with large prong spacing

Author(s) -

Hongpeng Wu,

Angelo Sampaolo,

Lei Dong,

Pietro Patimisco,

Xiaoli Liu,

Huadan Zheng,

Xukun Yin,

Weiguang Ma,

Lei Zhang,

Wangbao Yin,

Vincenzo Spagnolo,

Suotang Jia,

Frank K. Tittel

Publication year - 2015

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.4930995

Subject(s) - photoacoustic spectroscopy , materials science , amplifier , resonator , sensitivity (control systems) , time delay and integration , optoelectronics , signal (programming language) , tuning fork , noise (video) , optics , laser , acoustics , electronic engineering , vibration , cmos , physics , computer science , engineering , programming language , image (mathematics) , artificial intelligence

A quartz enhanced photoacoustic spectroscopy (QEPAS) sensor, employing an erbium-doped fiber amplified laser source and a custom quartz tuning fork (QTF) with its two prongs spaced ∼800 μm apart, is reported. The sensor employs an acoustic micro-resonator (AmR) which is assembled in an “on-beam” QEPAS configuration. Both length and vertical position of the AmR are optimized in terms of signal-to-noise ratio, significantly improving the QEPAS detection sensitivity by a factor of ∼40, compared to the case of a sensor using a bare custom QTF. The fiber-amplifier-enhanced QEPAS sensor is applied to H2S trace gas detection, reaching a sensitivity of ∼890 ppb at 1 s integration time, similar to those obtained with a power-enhanced QEPAS sensor equipped with a standard QTF, but with the advantages of easy optical alignment, simple installation, and long-term stability

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