Acetylene detection based on diode laser QEPAS: Combined wavelength and residual amplitude modulation

Y. Cao; W. Jin; H. L. Ho; L. Qi; Y. H. Yang

doi:10.1007/s00340-012-5221-4

Acetylene detection based on diode laser QEPAS: Combined wavelength and residual amplitude modulation

Y. Cao^*
, W. Jin
, H. L. Ho
, L. Qi
, Y. H. Yang

^*Corresponding author for this work

School of Instrumentation and Optoelectronic Engineering

Hong Kong Polytechnic University
Beihang University

Research output: Contribution to journal › Article › peer-review

40 Scopus citations

Abstract

Quartz-enhanced photoacoustic spectroscopy (QEPAS) is demonstrated for acetylene detection at atmospheric pressure and room temperature with a fiber-coupled distributed feedback (DFB) diode laser operating at ~1.53 μm. An efficient approach for gas concentration calibration is demonstrated. The effect of residual amplitude modulation on the performance of wavelength modulated QEPAS is investigated theoretically and experimentally. With optimized spectrophone parameters and modulation depth, a minimum detectable limit (1σ) of ~2 part-per-million volume (ppmv) was achieved with an 8.44-mW diode laser, which corresponds to a normalized noise equivalent coefficient (1σ) of 6.16 × 10^-8 cm^-1 W/Hz^1/2.

Original language	English
Pages (from-to)	359-366
Number of pages	8
Journal	Applied Physics B: Lasers and Optics
Volume	109
Issue number	2
DOIs	https://doi.org/10.1007/s00340-012-5221-4
State	Published - Nov 2012

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title = "Acetylene detection based on diode laser QEPAS: Combined wavelength and residual amplitude modulation",

abstract = "Quartz-enhanced photoacoustic spectroscopy (QEPAS) is demonstrated for acetylene detection at atmospheric pressure and room temperature with a fiber-coupled distributed feedback (DFB) diode laser operating at \textasciitilde{}1.53 μm. An efficient approach for gas concentration calibration is demonstrated. The effect of residual amplitude modulation on the performance of wavelength modulated QEPAS is investigated theoretically and experimentally. With optimized spectrophone parameters and modulation depth, a minimum detectable limit (1σ) of \textasciitilde{}2 part-per-million volume (ppmv) was achieved with an 8.44-mW diode laser, which corresponds to a normalized noise equivalent coefficient (1σ) of 6.16 × 10-8 cm-1 W/Hz1/2.",

author = "Y. Cao and W. Jin and Ho, \{H. L.\} and L. Qi and Yang, \{Y. H.\}",

year = "2012",

month = nov,

doi = "10.1007/s00340-012-5221-4",

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journal = "Applied Physics B: Lasers and Optics",

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T1 - Acetylene detection based on diode laser QEPAS

T2 - Combined wavelength and residual amplitude modulation

AU - Cao, Y.

AU - Jin, W.

AU - Ho, H. L.

AU - Qi, L.

AU - Yang, Y. H.

PY - 2012/11

Y1 - 2012/11

N2 - Quartz-enhanced photoacoustic spectroscopy (QEPAS) is demonstrated for acetylene detection at atmospheric pressure and room temperature with a fiber-coupled distributed feedback (DFB) diode laser operating at ~1.53 μm. An efficient approach for gas concentration calibration is demonstrated. The effect of residual amplitude modulation on the performance of wavelength modulated QEPAS is investigated theoretically and experimentally. With optimized spectrophone parameters and modulation depth, a minimum detectable limit (1σ) of ~2 part-per-million volume (ppmv) was achieved with an 8.44-mW diode laser, which corresponds to a normalized noise equivalent coefficient (1σ) of 6.16 × 10-8 cm-1 W/Hz1/2.

AB - Quartz-enhanced photoacoustic spectroscopy (QEPAS) is demonstrated for acetylene detection at atmospheric pressure and room temperature with a fiber-coupled distributed feedback (DFB) diode laser operating at ~1.53 μm. An efficient approach for gas concentration calibration is demonstrated. The effect of residual amplitude modulation on the performance of wavelength modulated QEPAS is investigated theoretically and experimentally. With optimized spectrophone parameters and modulation depth, a minimum detectable limit (1σ) of ~2 part-per-million volume (ppmv) was achieved with an 8.44-mW diode laser, which corresponds to a normalized noise equivalent coefficient (1σ) of 6.16 × 10-8 cm-1 W/Hz1/2.

UR - https://www.scopus.com/pages/publications/84869499869

U2 - 10.1007/s00340-012-5221-4

DO - 10.1007/s00340-012-5221-4

M3 - 文章

AN - SCOPUS:84869499869

SN - 0946-2171

VL - 109

SP - 359

EP - 366

JO - Applied Physics B: Lasers and Optics

JF - Applied Physics B: Lasers and Optics

IS - 2

ER -

Acetylene detection based on diode laser QEPAS: Combined wavelength and residual amplitude modulation

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