A CO trace gas detection system based on continuous wave DFB-QCL

Dang, Jingmin; Yu, Hao; Sun, Yujing; Wang, Yiding

doi:10.1016/j.infrared.2016.12.012

Cited by 20 publications

(7 citation statements)

References 21 publications

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“…The carbon monoxide (CO) detection system reached a limit of detection (LoD) of 26 ppb with a 1-s acquisition time. 11 A photoacoustic sensor with a distributed feedback (DFB) QCL is proposed for nitric oxide (NO) detection. The temperature of the QCL is set to 52°C to avoid any water-cooling systems.…”

Section: Introductionmentioning

confidence: 99%

Integration and thermal management of multiwavelength distributed feedback quantum cascade lasers

Gong

Wang

et al. 2022

Micro & Optical Tech Letters

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Integration of multiwavelength distributed feedback quantum cascade lasers (QCLs) in C-mount packages is demonstrated in this paper, which is applicable to portable gas sensors. The thermal management is performed by modeling and experimentally verifying. The QCLs with the wavelength of 4492, 5459, 6224, and 9640 nm are integrated. The wavelength tuning range and optical power of each QCL are no smaller than 6.5 nm and 65 mW, respectively. The dimensions of the integrated sources are 40mm × 40mm × 80mm.

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Section: Introductionmentioning

confidence: 99%

Integration and thermal management of multiwavelength distributed feedback quantum cascade lasers

Gong

Wang

et al. 2022

Micro & Optical Tech Letters

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“…are causing environmental contamination at an alarming rate [1][2][3][4][5]. Among the mentioned gases, carbon monoxide can be detrimental to human beings as it plays a significant role in contributing to polluting the atmospheric air due to the high amount of combustion processes [6]. As a result of combustion from motor vehicles and industries, CO is released into the atmosphere at an alarming rate.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of spray pyrolysed In:ZnO nanostructures for CO gas sensing at low concentration

Ani

Poornesh

Nagaraja

et al. 2021

J Mater Sci: Mater Electron

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Herein, we report the role of indium (In) on the carbon monoxide sensing of ZnO thin films using a low-cost spray pyrolysis technique. The decrease in crystalline size was observed from XRD studies and hexagonal wurtzite structure was confirmed. Photoluminescence and XPS studies proved the presence of various defects in the films. The gas-sensing properties of films toward carbon monoxide (CO) gas indicate that 15 wt% of In in ZnO thin films (IZO) exhibit high response (1.84) to a low concentration of the gas (1 ppm) at 300 °C compared to undoped ZnO (0.53). The observed high response of 15 wt% IZO can be mainly endorsed to the oxygen vacancy defects as observed from the photoluminescence and XPS analysis. Further, the high response is complemented by high surface area and smaller grain size (~ 13.1 nm) with well-defined grain boundaries as evident from SEM analysis as well as XRD studies.

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“…In 2017, J. Dang et al . 14 combined TDLAS with techniques of wavelength modulation spectroscopy and multipass gas cell, and adopted a high-power, continuous wave (CW) DFB QCL emitting at 4.7 μm to detect CO in N 2 , a minimum detection limit of 26 ppb was achieved. What is more, R. Ghorbani et al .…”

Section: Introductionmentioning

confidence: 99%

Highly Sensitive and Precise Analysis of SF6 Decomposition Component CO by Multi-comb Optical-feedback Cavity Enhanced Absorption Spectroscopy with a 2.3 μm Diode Laser

Wan

Zhou

et al. 2019

Sci Rep

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A ppb-level CO sensor based on multi-comb optical-feedback cavity enhanced absorption spectroscopy with a 2.3 μm diode laser was developed for SF 6 decomposition analysis in electric power system. The effective optical path reached to 4.5 km within 35 cm length cavity. Besides, through modulating the cavity length five times automatically, the spectral resolution was improved to 0.0015 cm −1 from 0.0071 cm −1 . Targeting the R (6) line of CO first overtone band at 4285.01 cm −1 , which is interference free from absorption spectra of SF 6 mixtures (SF 6 , SO 2 , H 2 S, SO 2 F 2 , HF, CF 4 , CO 2 , COS, O 2 and H 2 O), the minimum detection limit and detection precision under different gas pressures were performed. At optimum integration time of 30 s determined by Allan deviation analysis and gas pressure of 40 torr, the minimum detection limit and detection precision of CO were better than 18 ppb and 150 ppt, respectively.

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A CO trace gas detection system based on continuous wave DFB-QCL

Cited by 20 publications

References 21 publications

Integration and thermal management of multiwavelength distributed feedback quantum cascade lasers

Integration and thermal management of multiwavelength distributed feedback quantum cascade lasers

Evaluation of spray pyrolysed In:ZnO nanostructures for CO gas sensing at low concentration

Highly Sensitive and Precise Analysis of SF6 Decomposition Component CO by Multi-comb Optical-feedback Cavity Enhanced Absorption Spectroscopy with a 2.3 μm Diode Laser

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