Highly sensitive photoacoustic multi-gas analyzer combined with mid-infrared broadband source and near-infrared laser

Ke, Changjian; Liu, Shuai; Zhang, Bo; Gong, Zhenfeng; Chen, Yewei; Zhang, Ming; Deng, Hong; Guo, Min; Ma, Fengxiang; Zhu, Feng; Yu, Qingxu

doi:10.1016/j.optlaseng.2019.105844

Cited by 75 publications

(39 citation statements)

References 36 publications

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“…Due to the good selectivity of photoacoustic technology, STPAC could also be used for the detection of mixed gas. First, from the point of view of the light source, mutual interference between mixed gases could be avoided if an appropriate excitation spectral line was selected [ 53 ]. A CH 4 and CO 2 mixture was taken as an example, and the absorption lines of 2000 ppm CH 4 and 2000 ppm CO 2 near 1653 nm and 2004 nm were simulated through HITRAN database, as shown in Figure 18 .…”

Section: Discussionmentioning

confidence: 99%

Highly Sensitive Sphere-Tube Coupled Photoacoustic Cell Suitable for Detection of a Variety of Trace Gases: NO2 as an Example

Liu

et al. 2021

Sensors

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The concentration of trace gases in the atmospheric environment is extremely low, but it has a great impact on the living environment of organisms. Photoacoustic spectroscopy has attracted extensive attention in the field of trace gas detection because of its high sensitivity, good selectivity, and fast response. As the core of a photoacoustic detection setup, the photoacoustic cell has a significant impact on detection performance. To improve detection sensitivity, a sphere-tube coupled photoacoustic cell (STPAC) was developed, which was mainly composed of a diffuse-reflective sphere and an acoustic resonance tube. Modulated light was reflected multiple times in the sphere to increase optical path, and photoacoustic (PA) signals were further amplified by the tube. Based on STPAC, a PA gas detection setup was built with a laser diode (LD) at 450 nm as the light source. The experimental results showed that the minimum detection limit (noise equivalent concentration, NEC) of NO2 was ~0.7 parts per billion (ppb). Compared with the T-type PA cell (TPAC) in which the modulated light passed through the sphere, the signal-to-noise ratio of STPAC was increased by an order of magnitude at the same concentration of the NO2 sample.

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Section: Discussionmentioning

confidence: 99%

Highly Sensitive Sphere-Tube Coupled Photoacoustic Cell Suitable for Detection of a Variety of Trace Gases: NO2 as an Example

Liu

et al. 2021

Sensors

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“…The single-photon source and entangled photon source at mid-infrared (MIR) wavelength range (approximately 2-20 µm) are of great interest to many applications, such as quantum sensing, quantum imaging, quantum communication, and quantum measurement [1][2][3][4]. For example, a single-photon source in the MIR band is useful for gas sensing [5] and environmental monitoring [6] with high sensitivity. Moreover, it can be used for medical imaging [7], biological sample imaging [8], and thermal imaging [9] with ultra-low light levels.…”

Section: Introductionmentioning

confidence: 99%

Optimized design of the lithium niobate for spectrally-pure-state generation at MIR wavelengths using metaheuristic algorithm

Cai,

Tian,

Wang

et al. 2022

Preprint

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Quantum light sources in the mid-infrared (MIR) band play an important role in many applications, such as quantum sensing, quantum imaging, and quantum communication. However, there is still a lack of high-quality quantum light sources in the MIR band, such as the spectrally pure single-photon source. In this work, we present the generation of spectrally-pure state in an optimized poled lithium niobate crystal using a metaheuristic algorithm. In particular, we adopt the particle swarm optimization algorithm to optimize the duty cycle of the poling period of the lithium niobate crystal. With our approach, the spectral purity can be improved from 0.820 to 0.998 under the third group-velocity-matched condition, and the wavelength-tunable range is from 3.0 µm to 4.0 µm for the degenerate case and 3.0 µm to 3.7 µm for the nondegenerate case. Our work paves the way for developing quantum photonic technologies at the MIR wavelength band.

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“…The first devices required liquid nitrogen for cooling and allowed only pulsed operation, but they are currently commercially available in continuous wave mode at room temperature and emit up to several hundreds of mW. So far, numerous measurement techniques with QCLs have been applied to ambient air monitoring-ranging from Tunable Diode Laser Absorption Spectroscopy (TDLAS) [21][22][23], 2f-Wavelength Modulation Spectroscopy (2f-WMS) [24], photoacoustic [25][26][27] photothermal spectroscopy [28], cavity enhanced absorption spectroscopy [29] and also dispersion-based ones [30] have been demonstrated.…”

Section: Introductionmentioning

confidence: 99%

A Quantum Cascade Laser-Based Multi-Gas Sensor for Ambient Air Monitoring

Genner

Martín-Mateos

Moser

et al. 2020

Sensors

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A quantum cascade laser-based sensor for ambient air monitoring is presented and five gases, affecting the air quality, can be quantified. The light sources are selected to measure CO, NO, NO2, N2O and SO2. The footprint of the measurement setup is designed to fit in two standard 19” rack (48 cm × 65 cm) with 4 height units (18 cm) whereas one is holding the optical components and the other one contains the electronics and data processing unit. The concentrations of the individual analytes are measured using 2f-Wavelength Modulation Spectroscopy (2f-WMS) and a commercially available multipass gas cell defines the optical path. In addition, CO can also be measured with a dispersion-based technique, which allows one to cover a wider concentration range than 2f-WMS. The performance of this prototype has been evaluated in the lab and detection limits in the range of 1ppbv have been achieved. Finally, the applicability of this prototype for ambient air monitoring is shown in a five-week measurement campaign in cooperation with the Municipal Department for Environmental Protection (MA 22) of Vienna, Austria.

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Highly sensitive photoacoustic multi-gas analyzer combined with mid-infrared broadband source and near-infrared laser

Cited by 75 publications

References 36 publications

Highly Sensitive Sphere-Tube Coupled Photoacoustic Cell Suitable for Detection of a Variety of Trace Gases: NO2 as an Example

Highly Sensitive Sphere-Tube Coupled Photoacoustic Cell Suitable for Detection of a Variety of Trace Gases: NO2 as an Example

Optimized design of the lithium niobate for spectrally-pure-state generation at MIR wavelengths using metaheuristic algorithm

A Quantum Cascade Laser-Based Multi-Gas Sensor for Ambient Air Monitoring

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