Diode laser-based photoacoustic spectroscopy with interferometrically-enhanced cantilever detection

Laurila, Toni; Cattaneo, Heidi; Koskinen, V.; Kauppinen, J.; Hernberg, Rolf

doi:10.1364/opex.13.002453

Cited by 62 publications

(33 citation statements)

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“…Since the PA signal is directly proportional to the absorbed power, the PA technique is a zero-background technique resulting in high sensitivity on the order of 10 −9 cm −1 Hz −1/2 . New developments include a quartz-enhanced configuration named QEPAS [28] and a version with an interferometric detection of cantilever movement instead of a microphone [29].…”

Section: Detection Schemesmentioning

confidence: 99%

Trace gas monitoring with infrared laser-based detection schemes

et al. 2007

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The success of laser-based trace gas sensing techniques crucially depends on the availability and performance of tunable laser sources combined with appropriate detection schemes. Besides near-infrared diode lasers, continuously tunable midinfrared quantum cascade lasers and nonlinear optical laser sources are preferentially employed today. Detection schemes are based on sensitive absorption measurements and comprise direct absorption in multi-pass cells as well as photoacoustic and cavity ringdown techniques in various configurations. We illustrate the performance of several systems implemented in our laboratory. These include time-resolved multicomponent traffic emission measurements with a mobile CO 2 -laser photoacoustic system, a diode-laser based cavity ringdown device for measurements of impurities in industrial process control, isotope ratio measurements with a difference frequency (DFG) laser source combined with balanced path length detection, detection of methylamines for breath analysis with both a near-IR diode laser and a DFG source, and finally, acetone measurements with a heatable multipass cell intended for vapor phase studies on doping agents in urine samples.PACS 33.20.Ea; 42.62.Fi; 42.72.Ai; 87.64.km; 92.60 Trace gases play a key role in various areas such as air pollution, climate research, industrial process control, agriculture, food industry, volcanology, workplace safety and medical diagnostics. There exist numerous gas sensing devices based on different detection principles like gas chromatography (GC), mass spectrometry (MS) or combinations of the two (GC-MS), chemiluminescence, Fourier transform infrared spectroscopy (FTIR), electrochemical sensors, colorimetry, etc. In recent years, laser-spectroscopic sensing devices have attracted a lot of interest (see e.g., [1]) as they enable high detection sensitivity (down to sub-ppb concentrations) and selectivity (including differentiation between isotopomers and isomers), multicomponent capabil- Trace gas sensor requirements with corresponding approach for laser-based detection system ity and large dynamic range (several orders of magnitude in concentration), and generally neither sample-preparation nor -preconcentration are required. However, the laser source characteristics in terms of available wavelengths, tunability, linewidth, power, operation temperature, etc., as well as the combination with appropriate sensitive detection schemes are crucial for the success of laser-based sensing. Table 1 lists the main sensing requirements and the corresponding approaches using laser-based methods. Ideally, one system can fulfill all requirements. The combination of broad continuous tuning with a narrow linewidth and a certain power level favors laserbased systems. Laser sourcesTunable near-infrared (near-IR) lasers are readily available, notably diode lasers equipped with an external cavity. These external cavity III-V diode lasers (ECDLs) represent excellent sources in terms of availability, compactness, robustness and tuning characteri...

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Section: Detection Schemesmentioning

confidence: 99%

Trace gas monitoring with infrared laser-based detection schemes

et al. 2007

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“…The photoacoustic signal is traditionally detected using a resonant acoustic cell equipped with a sensitive microphone. Recently, alternative transducers, such as a quartz tuning fork (TF) [54], optimized capacitive micro-electromechanical system microphones [55], or the silicon cantilevers [56] were used. Nowadays, a super-sensitive detector of explosives was demonstrated [57].…”

Section: Detection Of Explosives Using Optical Methodsmentioning

confidence: 99%

Sensors and Systems for the Detection of Explosive Devices - An Overview

Bielecki¹,

Janucki²,

Kawalec³

et al. 2012

Metrology and Measurement Systems

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The paper presents analyses of current research projects connected with explosive material sensors. Sensors are described assigned to X and γ radiation, optical radiation sensors, as well as detectors applied in gas chromatography, electrochemical and chemical sensors. Furthermore, neutron techniques and magnetic resonance devices were analyzed. Special attention was drawn to optoelectronic sensors of explosive devices.

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“…The basic principles [14] for choosing the characteristic wavelengths of CO gas are as follows. All characteristic wavelengths should be covered in the spectrum output range of the radiation source.…”

Section: The Molecular Spectral Line Of Carbon Monoxidementioning

confidence: 99%

“…And with the advantages of narrow line width, tunable wavelength, and so forth, diode laser has developed as an ideal light source, which can be used to analyze molecular absorption lines and obtain good selectivity, large dynamic range, excellent portability, and adjustability [14]. In this study, a distributed-feedback (DFB) diode laser-based PAS experimental system was proposed, and the molecular spectral line was selected at 1.567 m for CO detection.…”

Section: Introductionmentioning

confidence: 99%

Detection of Dissolved Carbon Monoxide in Transformer Oil Using 1.567 μm Diode Laser-Based Photoacoustic Spectroscopy

Zhou

Tang

Zhu

et al. 2015

Journal of Spectroscopy

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Carbon monoxide (CO) is one of the most important fault characteristic gases dissolved in power transformer oil. With the advantages of high sensitivity and accuracy, long-term stability, and short detection time, photoacoustic spectroscopy (PAS) has been proven to be one promising sensing technology for trace gas recognition. In this investigation, a tunable PAS experimental system based on a distributed-feedback (DFB) diode laser was proposed for recognizing dissolved CO in transformer oil. The molecular spectral line of CO gas detection was selected at 1.567 m in the whole experiment. Relationships between the photoacoustic (PA) signal and gas pressure, temperature, laser power, and CO gas concentration were measured and discussed in detail, respectively. Finally, based on the least square regression theory, a novel quantitative identification method for CO gas detection with the PAS experimental system was proposed. And a comparative research about the gas detection performances performed by the PAS system and gas chromatography (GC) measurement was presented. All results lay a solid foundation for exploring a portable and tunable CO gas PAS detection device for practical application in future.

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Diode laser-based photoacoustic spectroscopy with interferometrically-enhanced cantilever detection

Cited by 62 publications

References 0 publications

Trace gas monitoring with infrared laser-based detection schemes

Trace gas monitoring with infrared laser-based detection schemes

Sensors and Systems for the Detection of Explosive Devices - An Overview

Detection of Dissolved Carbon Monoxide in Transformer Oil Using 1.567 μm Diode Laser-Based Photoacoustic Spectroscopy

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