Book ChapterDOI
Supercontinuum Laser Based Photoacoustic Spectroscopic Sensor for Acetylene Gas Detection
Bintomol Baby,Ramya Selvaraj,Nilesh J. Vasa,Jobin K. Antony +3 more
- Vol. 249, pp 165-167
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TLDR
An in-situ optical system based on photoacoustic approach with supercontinuum laser source (SCL) for monitoring of acetylene (C2H2) has been proposed and demonstrated as mentioned in this paper.Abstract:
An in-situ optical system based on photoacoustic approach with Supercontinuum laser source (SCL) for monitoring of acetylene (C2H2) has been proposed and demonstrated. The SCL has a broadband spectrum of 800–2800 nm. A bandpass filter with a bandwidth of 50 nm (FWHM) and center wavelength of 1525 nm was used for selecting the absorption wavelength of C2H2. Direct absorption spectroscopy (DAS) and Photoacoustic spectroscopy (PAS) output was monitored for different concentrations of C2H2. The minimum detection limit of PAS is found to be 105 times better than DAS. Simultaneous measurement of multiple gas species is also possible with the proposed optical sensor.read more
Citations
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Journal ArticleDOI
High-sensitivity acetylene detection system using ellipsoid multi-pass cell (EMPC) based on the opposite dual optical source
TL;DR: In this article, a multi-pass cell with ellipsoid structure used dual optical source of opposite side was proposed firstly in the EMPC was composed of double concave spherical mirrors.
References
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Journal ArticleDOI
Photoacoustic techniques for trace gas sensing based on semiconductor laser sources.
TL;DR: The paper provides an overview on the use of photoac acoustic sensors based on semiconductor laser sources for the detection of trace gases using standard, differential and quartz enhanced photoacoustic techniques.
Journal ArticleDOI
Cavity enhanced absorption spectroscopy of multiple trace gas species using a supercontinuum radiation source
TL;DR: This work reports the first use of a supercontinuum radiation source for broadband trace gas detection using a cavity enhanced absorption technique, and demonstrates that a conceptually simple and robust instrument is capable of highly sensitive broadband absorption measurements.
Journal ArticleDOI
High bandwidth absorption spectroscopy with a dispersed supercontinuum source
TL;DR: An optical gas sensor is presented, making use of a dispersed supercontinuum source, capable of acquiring broad bandwidth spectra at ultrahigh wavelength sweep and repetition rates, and the effect of this averaging on observed precision is investigated.
Journal ArticleDOI
Recent Progress on Infrared Photoacoustic Spectroscopy Techniques
TL;DR: In this article, a review of the recent development of infrared photoacoustic spectroscopy (PAS) is presented, with special emphasis on the development of new or enhanced analytical methodologies based on the use of the photo-acoustic (PA) effect to improve the sensitivity of PAS by enhancing signal or reducing noise levels.
Journal ArticleDOI
Off-resonant photoacoustic spectroscopy for analysis of multicomponent gas mixtures at high concentrations using broadband vibrational overtones of individual gas species
TL;DR: The broadband photoacoustic spectroscopy technique is proposed and demonstrated for measurement of CH4, CO2, and H2O vapor in the 1.6 to 2.0 μm wavelength region and exhibits a wide concentration measurement range of parts per billion by volume to 100%.