Infrared luminescence of the active medium of a CO2 laser

Vagin, S. P.; Vorontsov, S. S.; Yakobi, Yu. A.

doi:10.1007/bf00613763

Cited by 2 publications

(4 citation statements)

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“…The heavy dependence of the radiation intensity of the vibrationally nonequilibrated gas bands on the vibrational temperatures of the active modes points to a high precision of the method for determining the vibrational temperatures from the IR-radiation intensity measurements [20,24,27,47]. The data of figure 15 and table III prove that at a measurement accuracy of the IR-radiation intensity, equal to 10 % .…”

Section: C90jmentioning

confidence: 94%

“…Consequently, the problem of finding the spontaneous IR-radiation intensity of a vibrationally nonequilibrated gas consists in calculating the Planck function for the individual vibrational transitions L(n,i)03C9, the corresponding averaged transmissivities 0 3 C 4 ( n , i ) 0 3 C 9 & # x 3 E ; and the total averaged gas transmissivities ~iw ~. Calculation of the averaged spectral transmissivity of the 4.3 ktm CO2 band in the vibrationally nonequilibrated conditions with the use of various approximations has been performed elsewhere [20,[22][23][24][25][26][27]. These works employ a number of theoretical results relating to the equilibrium CO2 emissivity [28,29].…”

Section: C90jmentioning

confidence: 99%

“…-Relative error in the determination of the equivalent black width ~AN~-~A~ ~A~ of the 4.7 gm CO and 4.3 pm, 2.7 lim C02 bands depending on the gas pressure. Calculational and numbering conditions correspond to those of figure 7. In a number of works [20,24,27 and others] the intensity of the vibrationally nonequilibrated gas was determined by using a model of isolated rotational spectral lines. It will be interesting to reveal the application limits of this approximation.…”

Section: C90jmentioning

confidence: 99%

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A study of infrared radiation of vibrationally excited CO in the 4.7 μm band and CO2 in the 4.3 μm and 2.7 μm bands

Kudryavtsev¹,

Новиков²

1981

Rev. Phys. Appl. (Paris)

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Section: C90jmentioning

confidence: 94%

Section: C90jmentioning

confidence: 99%

Section: C90jmentioning

confidence: 99%

See 1 more Smart Citation

A study of infrared radiation of vibrationally excited CO in the 4.7 μm band and CO2 in the 4.3 μm and 2.7 μm bands

Kudryavtsev¹,

Новиков²

1981

Rev. Phys. Appl. (Paris)

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“…It can be done both by analytical [2] and numerical [1] methods. Radiation intensity and absorptivity of carbon dioxide have been calculated at 4.3 ym in [3][4][5][6][7][8][9][10][11][12][13], at 2.7 pm in [6, 10-13] and at 15 ym in [10] with harmonic oscillator-rigid rotor approximation for determination of rotational lines intensities and spectral distribution for the conditions, where nonequilibrium Boltzmann population distribution in vibrational modes occurrs.…”

Section: Introductionmentioning

confidence: 99%

Radiation of vibrationally nonequilibrium carbon dioxide in the 12 to 19 μm region

Kryuchkov

Kudryavtsev

Новиков

1984

Rev. Phys. Appl. (Paris)

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2014 On a fait des calculs numériques d'absorptivité et d'intensité de l'émission de CO2 dans la bande vibro-rotationnelle de 15 03BCm en tenant compte des particularités de la structure de cette bande pour une large étendue de paramètres de flux du gaz incluant en particulier les conditions dans les résonateurs de lasers gazodynamiques à CO2 qui fonctionnent dans le domaine spectral de 03BB = 9-11 03BCm et de 03BB = 16-19 03BCm. Les calculs en P et R-branches ont été faits en utilisant un modèle statistique et un modèle de lignes isolées, et en Q-branches ; par une intégration directe « ligne par ligne » à travers le spectre. On a trouvé les dépendances typiques des paramètres du gaz hors d'équilibre vibratoire. Les résultats ont été utilisés afin d'élaborer la méthode déterminant la température vibrationnelle du mode confondu selon l'intensité intégrale d'émission de bande, des populations de certains niveaux vibrationnels et de la température vibrationnelle du mode asymétrique selon l'absorptivité intégrale dans certaines Q-branches. Abstract. 2014 Numerical computations of CO2 absorptivity and radiation intensity have been carried out with regard to specific features of the 15 03BCm vibrational-rotational band within a wide range of gas flow parameters, including, in particular, the conditions in the cavities of gasdynamic CO2 lasers operating in the 03BB = 9-11 03BCm and 03BB = 16-19 03BCm spectral regions. The calculations in the P-and R-branches were carried out using the statistical model and the isolated line model, and in the Q-branches by direct « line-by-line » integration over the spectrum. Typical dependences on the vibrationally excited gas parameters have been determined. The results have been used for developing a method of determination of the vibrational temperature of the bend-stretch manifold according to the integrated radiation intensity of the band, populations of certain vibrational levels, and the vibrational temperature of the asymmetric stretching mode according to integrated absorptivity in certain Q-branches.

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Infrared luminescence of the active medium of a CO2 laser

Cited by 2 publications

References 5 publications

A study of infrared radiation of vibrationally excited CO in the 4.7 μm band and CO2 in the 4.3 μm and 2.7 μm bands

A study of infrared radiation of vibrationally excited CO in the 4.7 μm band and CO2 in the 4.3 μm and 2.7 μm bands

Radiation of vibrationally nonequilibrium carbon dioxide in the 12 to 19 μm region

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