H-shaped acoustic micro-resonator-based quartz-enhanced photoacoustic spectroscopy

Ma, Yufei; Hong, Yinghao; Qiao, Shunda; Lang, Ziting; Liu, Xiao‐Nan

doi:10.1364/ol.449822

Cited by 93 publications

(73 citation statements)

References 33 publications

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“…QTF-based gas sensing technologies, quartzenhanced photoacoustic spectroscopy (QEPAS), and lightinduced thermoelastic spectroscopy (LITES), which were firstly, to the best of our knowledge, reported in 2002 and 2018 by Tittel [11] and Ma [12] , respectively, both use QTF as a detection unit. However, QEPAS requires QTF to be placed in the tested gas environment [13][14][15][16][17][18][19][20] , which means that it is a contact measurement method [21] . This therefore limits its application in some specific areas such as combustion field diagnosis and corrosive gas detection, because the resonance characteristics of QTF will be affected in such conditions [22] .…”

Section: Introductionmentioning

confidence: 99%

Sensitive carbon monoxide detection based on light-induced thermoelastic spectroscopy with a fiber-coupled multipass cell [Invited]

Liu

2022

Chin. Opt. Lett.

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119

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A sensor based on light-induced thermoelastic spectroscopy (LITES) with a fiber-coupled multipass cell was demonstrated for carbon monoxide (CO) detection. The fiber-coupled structure has the merits of reducing optical interference and difficulty in optical alignment and increasing system robustness. A 1.57 μm continuous wave distributed feedback diode laser was used as the excitation source. A minimum detection limit of 9 ppm was obtained, and the calculated normalized noise equivalent absorption coefficient was 1.15 × 10 −7 cm −1 • W • Hz −1=2 . The reported CO-LITES sensor showed excellent linear concentration response and system stability.

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Section: Introductionmentioning

confidence: 99%

Sensitive carbon monoxide detection based on light-induced thermoelastic spectroscopy with a fiber-coupled multipass cell [Invited]

Liu

2022

Chin. Opt. Lett.

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119

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“…These vibrations generate a charge distribution due to the piezoelectric effect [11] , [12] , which is collected by the metal pattern deposited on the QTF surface [13] , [14] . Compared with traditional optical trace gas sensing techniques such as tunable diode laser absorption spectroscopy and microphone based photoacoustic spectroscopy, QEPAS provides additional figures of merit, like compactness, laser wavelength independence and immunity to the ambient noise due to the sharp frequency response of the QTF [15] , [16] , [17] , [18] , [19] , [20] , [21] , [22] . A novel QTF-based gas sensing method is light-induced thermoelastic spectroscopy (LITES), which was firstly reported in 2018 [23] .…”

Section: Introductionmentioning

confidence: 99%

Quartz tuning forks resonance frequency matching for laser spectroscopy sensing

Qiao

et al. 2022

Photoacoustics

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In this paper, we report on the performance of quartz tuning fork (QTF) based laser spectroscopy sensing employing multiple QTFs. To avoid that resonance frequency mismatching of the QTFs degrades the sensor performance, two types of resonance frequency matching method are here proposed. A system based on the coupling of two sensing modules, one based on quartz-enhanced photoacoustic spectroscopy (QEPAS) and one on light-induced thermoelastic spectroscopy (LITES) technique, was realized to validate the proposed methods. Each module employed a different QTF (QTF1 and QTF2, respectively). Operating temperature or pressure of QTF2 were regulated to match the resonance frequency of QTF1, which operated at 25.0 °C and atmospheric pressure. Without regulation, the difference between QTF1 and QTF2 resonance frequencies was 2.42 Hz and the superposition coefficient η was only 54.7%. When the temperature regulation was carried out, at a QTF2 operating temperature of 67.5 °C, an optimal η value of 95.0% was obtained. For the pressure regulation approach, if operating QTF2 at pressure of 500 Torr, η reached a value of 97.2%. The obtained results show that the proposed two methods are effective in resonance frequency matching of QTFs for gas sensing systems.

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“…Laser spectroscopy has been widely used in trace gas detection. The detection sensitivity is up to ppt level [8,9] and the volume is getting smaller [10,11]. In the measurement of atmospheric trace gases, laser heterodyne radiometers (LHRs) have been used extensively, because of their inherent high spectral resolution (υ/Δυ up to approximately 10 8 ), easy system integration, and other characteristics [12].…”

Section: Introductionmentioning

confidence: 99%

Measurements of Atmospheric Water Vapor by a 1.316 μm Optical Fiber Laser Heterodyne Radiometer

Huang

et al. 2022

Front. Phys.

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A passive optical fiber laser heterodyne radiometer prototype with a semiconductor laser near 1.316 μm as the local oscillator was built, parameters of the prototype have been optimized. Using the prototype, the water vapor concentration in the atmospheric column was measured with a spectral resolution of 0.009 cm−1 in late October and early November of 2020, the collection time was approximately 3 min, and the signal-to-noise ratio was better than 120. The water vapor column concentration and profiles were inversed based on the optimal estimation method. Compared with the measurement of the Fourier transform spectrometer (EM27/SUN) which was performed simultaneously, the inversion results deviated by less than 14%, and the variation trend of the water vapor concentration showed good consistency. It is demonstrated that the 1.316 μm optical fiber laser heterodyne radiometer possesses good stability and accuracy in the field measurement of atmospheric water vapor concentration.

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H-shaped acoustic micro-resonator-based quartz-enhanced photoacoustic spectroscopy

Cited by 93 publications

References 33 publications

Sensitive carbon monoxide detection based on light-induced thermoelastic spectroscopy with a fiber-coupled multipass cell [Invited]

Sensitive carbon monoxide detection based on light-induced thermoelastic spectroscopy with a fiber-coupled multipass cell [Invited]

Quartz tuning forks resonance frequency matching for laser spectroscopy sensing

Measurements of Atmospheric Water Vapor by a 1.316 μm Optical Fiber Laser Heterodyne Radiometer

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