Two-channel opto-acoustic diode laser spectrometer and fine structure of methane absorption spectra in 6070–6180cm−1 region

Kapitanov, V. A.; Ponomarev, Yu. N.; Tyryshkin, I. S.; Rostov, Andrey P.

doi:10.1016/j.saa.2006.10.046

Cited by 33 publications

(13 citation statements)

References 16 publications

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“…Basic parameters of the spectrometer are presented in Table 1. The spectrometer scheme and measurement procedure are presented in more details in [26]. The TEC-100 semiconductor laser with an outer cavity (Sacher Laser Technik) generates the continuous single-frequency radiation within 6020-6300 cm −1 at a radiation spectrum width not exceeding ∼ 10 MHz and an output power of 0.003-0.01 W. The radiation power is controlled with a built-in photodiode and is modulated with a variable frequency optical chopper, Model 300C, SCITEC INSTRUMENTS [27].…”

Section: The Two-channel Oa Spectrometer With Tdl In Tomskmentioning

confidence: 99%

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High-resolution spectroscopy and preliminary global analysis of C–H stretching vibrations of C2H4 in the 3000 and 6000cm−1 regions

Gonzalez¹,

Boudon²,

Loëte³

et al. 2010

Journal of Quantitative Spectroscopy and Radiative Transfer

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Ethylene (ethene, H 2 C=CH 2 ) is a naturally occurring compound in ambient air that affects atmospheric chemistry and global climate. The C 2 H 4 spectrum is available in databases only for the 1000 and 3000 cm −1 ranges.In this work, the ethylene absorption spectrum was measured in the 6030-6250 cm −1 range with the use of a high resolution Bruker IFS 125HR Fourierspectrometer and a two-channel opto-acoustic spectrometer with a diode laser. * To whom correspondence should be addressed. E-mail: Vincent.Boudon@u-bourgogne.fr. As a secondary standard of wavelengths, the methane absorption spectrum was used in both cases. A preliminary analysis was realized thanks to the tensorial formalism developed by the Dijon group that is implemented in the XTDS software package [Ch. Wenger, V. Boudon, M. Rotger, J.-P. Champion and M. Sanzharov, J. Mol. Spectrosc., 251, 102-113 (2008).]. We considered the two combination bands ν 5 + ν 9 and ν 5 + ν 11 as an interacting dyad. Parameters for the ν 9 /ν 11 dyad were fitted simultaneously from a re-analysis of previously recorded supersonic expansion jet FTIR data, while parameters for the v 5 = 1 Raman level were taken from literature. More than 600 lines could be assigned in the 6030-6250 cm −1 region (and also 682 in the 2950-3150 cm −1 region) and effective Hamiltonian parameters were fitted, including Coriolis interaction parameters. The dyad features are globally quite well reproduced, even if there are still problems at high J values.

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Section: The Two-channel Oa Spectrometer With Tdl In Tomskmentioning

confidence: 99%

“…We used PA detectors (PAD) based on the differential Helmholtz resonator (DHR) [26]. This resonator has a remarkable peculiarity: acoustic oscillations in DHR cells at the resonance frequency are in anti-phase.…”

Section: The Two-channel Oa Spectrometer With Tdl In Tomskmentioning

confidence: 99%

High-resolution spectroscopy and preliminary global analysis of C–H stretching vibrations of C2H4 in the 3000 and 6000cm−1 regions

Gonzalez¹,

Boudon²,

Loëte³

et al. 2010

Journal of Quantitative Spectroscopy and Radiative Transfer

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“…Currently, a same PA cell is being constructed in our lab, thus differential detection scheme can be carried out. In that case, the PA system's sensitivity can be improved by one or two orders of magnitude [31]. Moreover, pressure shift coefficients can also be accurately measured with this tow-channel photoacoustic diode laser spectrometer.…”

Section: Resultsmentioning

confidence: 99%

Self-, N2- and O2-broadening coefficients for the 12C16O2 transitions near-IR measured by a diode laser photoacoustic spectrometer

Li¹,

Liu²,

Zhang³

et al. 2008

Journal of Molecular Spectroscopy

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“…To subtract signals from two microphones, analog differential amplifiers are often used [6][7][8]. A typical electronic circuit performing differential detection in a photoacoustic system [9] is shown in Fig.…”

Section: Digital Differential Detectionmentioning

confidence: 99%

Photoacoustic Cell with Digital Differential Detection

Suchenek

2015

Int J Thermophys

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Solutions which reduce the impact of the external acoustic noise on the photoacoustic signal rely often on the appropriate modification of the photoacoustic cell structure. The goal is to obtain a frequency response of the cell which suppresses the external noise as much as possible. Another approach is differential detection, in which two microphones are used, and assuming that the external noise signal components from both microphones are identical, their subtraction should result in canceling the external noise. The main difficulty of that solution is that both microphone signal paths should be calibrated to have virtually identical characteristics. The paper presents a differential photoacoustic cell with digital differential detection.

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Two-channel opto-acoustic diode laser spectrometer and fine structure of methane absorption spectra in 6070–6180cm−1 region

Cited by 33 publications

References 16 publications

High-resolution spectroscopy and preliminary global analysis of C–H stretching vibrations of C2H4 in the 3000 and 6000cm−1 regions

High-resolution spectroscopy and preliminary global analysis of C–H stretching vibrations of C2H4 in the 3000 and 6000cm−1 regions

Self-, N2- and O2-broadening coefficients for the 12C16O2 transitions near-IR measured by a diode laser photoacoustic spectrometer

Photoacoustic Cell with Digital Differential Detection

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