Journal ArticleDOI
Multipass matrix systems for diode laser spectroscope
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TLDR
In this paper, the authors developed a matrix system with a large angular aperture for high-resolution IR diode laser spectrometers with high optical and performance parameters, which is called four-objective matrix system.About:
This article is published in Infrared Physics & Technology.The article was published on 1996-02-01. It has received 12 citations till now. The article focuses on the topics: Matrix (mathematics) & Aperture.read more
Citations
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Journal ArticleDOI
New generation of multipass systems in high resolution spectroscopy
TL;DR: In this article, a brief review deals with various types of new multipass systems developed for high-resolution spectroscopic applications at the Russian Academy of Sciences, i.e., laser technology, metrology, spectral instrument engineering and environment.
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Promising version of the three-objective multipass matrix system.
TL;DR: A modified three-objective multipass matrix system is considered that is used equally successfully both in highresolution spectroscopy and in metrology as well-controlled delay lines of pulse optical signals.
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Methods of highly sensitive gas analysis of molecular biomarkers in study of exhaled air
TL;DR: In this paper, a review of the methods of highly sensitive gas analysis of molecular biomarkers in exhaled air is presented, as well as general requirements for the applied instrumental approach.
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Stability of widely tuneable, continuous wave external-cavity quantum cascade laser for absorption spectroscopy
Vasili L. Kasyutich,Raja Kamarulzaman Raja Ibrahim,Raja Kamarulzaman Raja Ibrahim,Philip A. Martin +3 more
TL;DR: The performance of widely tuneable, continuous wave (cw) external-cavity quantum cascade laser (EC-QCL) has been evaluated for direct absorption spectroscopy measurements of nitric oxide (NO) in the wavenumber range 1872-1958 cm −1 and with a 13.5cm long optical cell.
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Spatial distribution of methane over Lake Baikal surface.
V. A. Kapitanov,I. S. Tyryshkin,N.P. Krivolutskii,Yu. N. Ponomarev,M. De Batist,R.Yu. Gnatovsky +5 more
TL;DR: The results of application of a high sensitivity methane laser detector to investigations of the methane concentration in the atmosphere over Baikal lake are presented as well as methane flows from the water into the atmosphere.
References
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Journal ArticleDOI
Long Optical Paths of Large Aperture
TL;DR: In this article, an absorption cell is described, in which the light traverses a small volume a large and arbitrarily variable number of times, and the angular aperture of the mirrors is not occulted either on or off the optical axis, and can be used for observing spectra that are very weak, or that belong to high boiling point compounds or to compounds obtainable only in very low concentrations.
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Optical multipass matrix systems.
S. M. Chernin,E. G. Barskaya +1 more
TL;DR: Large relative aperture three- and four-objective multipass matrix systems ensuring the longest optical path length in an absorbing medium have been developed for high resolution laser spectroscopy.
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Multipass System with Large Relative Aperture
TL;DR: In this paper, a six-pass system with compensated astigmatism was proposed for high-temperature spectroscopy, which provides twice increased relative aperture at the same transversal size of the cell and uses simple cylindric tubes instead of more complicated shape.
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Aberrations of a multipass matrix system.
TL;DR: A three-objective multipass matrix system has been theoretically analyzed with respect to the aberrations of the third order and relationships to determine the field curvature and distortion have been derived.
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Laser Multipass Collimator
TL;DR: In this paper, the laser multipass collimator (LMC) is proposed for the problems of optically active media. But the LMC is not suitable for high-rate exchange reactions with production of halogen atoms.