Photoacoustic spectroscopy and trace gas analysis using a pulsed PPLN optical parametric oscillator

2000 ◽  
Author(s):  
G.-C. Liang ◽  
H.-H. Liu ◽  
A.H. Kung ◽  
A. Schmohl ◽  
A. Miklos ◽  
...  
Keyword(s):  
Optical Parametric Oscillator ◽  
Photoacoustic Spectroscopy ◽  
Gas Analysis ◽  
Parametric Oscillator ◽  
Trace Gas ◽  
Trace Gas Analysis ◽  
Optical Parametric

scholarly journals Off-axis quartz-enhanced photoacoustic spectroscopy using a pulsed nanosecond mid-infrared optical parametric oscillator

2016 ◽  
Vol 41 (17) ◽  
pp. 4118 ◽  
Author(s):  
Mikael Lassen ◽  
Laurent Lamard ◽  
Yuyang Feng ◽  
Andre Peremans ◽  
Jan C. Petersen
Keyword(s):  
Optical Parametric Oscillator ◽  
Photoacoustic Spectroscopy ◽  
Parametric Oscillator ◽  
Mid Infrared ◽  
Optical Parametric

scholarly journals Quantitative Evaluation of Broadband Photoacoustic Spectroscopy in the Infrared with an Optical Parametric Oscillator

Sensors ◽  
2018 ◽  
Vol 18 (11) ◽  
pp. 3971 ◽  
Author(s):  
Henry Bruhns ◽  
Marcus Wolff ◽  
Yannick Saalberg ◽  
Klaus Spohr
Keyword(s):  
Optical Parametric Oscillator ◽  
Photoacoustic Spectroscopy ◽  
Continuous Wave ◽  
Wavelength Region ◽  
Parametric Oscillator ◽  
Mixed Gas ◽  
Infrared Wavelength ◽  
Section Data ◽  
Optical Parametric ◽  
Low Concentrations

We evaluate the spectral resolution and the detection thresholds achievable for a photoacoustic spectroscopy (PAS) system in the broadband infrared wavelength region 3270 n m ≲ λ ≲ 3530 n m driven by a continuous wave optical parametric oscillator (OPO) with P ¯ ≈ 1.26 W . The absorption spectra, I PAS ( λ i ) , for diluted propane, ethane and methane test gases at low concentrations ( c ∼ 100 ppm ) were measured for ∼1350 discrete wavelengths λ i . The I PAS ( λ i ) spectra were then compared to the high resolution cross section data, σ FTIR , obtained by Fourier Transform Infrared Spectroscopy published in the HITRAN database. Deviations of 7.1(6)% for propane, 8.7(11)% for ethane and 15.0(14)% for methane with regard to the average uncertainty between I PAS ( λ i ) and the expected reference values based on σ FTIR were recorded. The characteristic absorption wavelengths λ res can be resolved with an average resolution of δ λ res ∼ 0.08 nm . Detection limits range between 7.1 ppb (ethane) to 13.6 ppb (methane). In an additional step, EUREQA, an artificial intelligence (AI) program, was successfully applied to deconvolute simulated PAS spectra of mixed gas samples at low limits of detection. The results justify a further development of PAS technology to support e.g., biomedical research.

scholarly journals Optical frequency comb photoacoustic spectroscopy

2018 ◽  
Vol 20 (44) ◽  
pp. 27849-27855 ◽  
Author(s):  
Ibrahim Sadiek ◽  
Tommi Mikkonen ◽  
Markku Vainio ◽  
Juha Toivonen ◽  
Aleksandra Foltynowicz
Keyword(s):  
High Resolution ◽  
Photoacoustic Spectroscopy ◽  
Frequency Comb ◽  
Gas Analysis ◽  
Small Sample ◽  
Optical Frequency Comb ◽  
Trace Gas ◽  
Optical Frequency ◽  
Trace Gas Analysis ◽  
First Time

Optical frequency comb photoacoustic spectroscopy (OFC-PAS) is demonstrated for the first time for broadband high-resolution trace gas analysis in small sample volumes.

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