Thermal self-action of high-power continuous and pulse-periodic CO2 laser radiation in air: II. Laboratory experiments

被引：7

作者：

Grachev G.N. ^{[1
]}

Zemlyanov A.A. ^{[2
]}

Ponomarenko A.G. ^{[1
]}

Tishchenko V.N. ^{[1
]}

Geints Y.E. ^{[2
]}

Kabanov A.M. ^{[2
]}

Pavlov A.A. ^{[3
,4
]}

Pogodaev V.A. ^{[2
]}

Pinaev P.A. ^{[1
]}

Smirnov A.L. ^{[1
]}

Statsenko P.A. ^{[1
]}

机构：

[1] Institute of Laser Physics, Siberian Branch, Russian Academy of Sciences, pr. Akademika M.A. Lavrentieva 13/3, Novosibirsk

[2] V.E. Zuev Institute of Atmospheric Optics, Siberian Branch, Russian Academy of Sciences, pl. Akademika Zueva 1, Tomsk

[3] Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences, ul. Institutskaya 4/1, Novosibirsk

[4] Novosibirsk State University, ul. Pirogova 2, Novosibirsk

来源：

Atmospheric and Oceanic Optics | 2014年 / 27卷 / 2期

基金：

俄罗斯基础研究基金会;

关键词：

Laser Radiation; Pulse Repetition Rate; Pulse Periodic; Thermal Lens; Continuous Radiation;

D O I：

10.1134/S1024856014020067

中图分类号：

学科分类号：

摘要：

Results of laboratory experiments on nonlinear propagation of high-power pulse-periodic and continuous CO2 laser radiation in a gas medium are presented. The experiments were carried out in a cell filled with a mixture of air and carbon dioxide in different partial concentrations (∼1–4%) under strong absorption and thermal blooming of laser radiation. The experimental conditions simulated the atmospheric propagation of high-power laser radiation along a kilometer-long path. Sharply focused laser beams were used; the regions of heat release along the beam channel were recorded by the shadow imaging technique. We found that, despite increased intensity, the focal waist of a laser beam is characterized by reduced heat release as compared to that in the pre- and postfocal beam regions. The saturation effect of the resonance absorption coefficient of CO2 at high pulse peak intensity (blooming effect) is considered as the most probable physical cause of the above feature. For continuous radiation, this effect is much weaker. © 2014, Pleiades Publishing, Ltd.

引用

页码：115 / 122

页数：7

共 11 条

[1]

Tishchenko V.N., Apollonov V.V., Grachev G.N., Gulidov A.I., Zapryagaev V.I., Men'shikov Y.G., Smirnov A.L., Sobolev A.V., Interaction of an optical pulsed discharge with a gas: conditions for stable generation and merging of shock waves, Quant. Electron., 34, 10, pp. 941-947, (2004)

[2]

Tishchenko V.N., Posukh V.G., Gulidov A.I., Zapryagaev V.I., Pavlov A.A., Boyarintsev E.L., Golubev M.P., Kavun I.N., Melekhov A.V., Golobokova L.S., Miroshnichenko I.B., Pavlov A.A., Shmakov A.S., Criteria for formation of low-frequency sound under wide-aperture repetitively pulsed laser irradiation of solids, Quant. Electron., 41, 10, pp. 895-900, (2011)

[3]

Tishchenko V.N., Posukh V.G., Boyarintsev E.L., Melekhov A.V., Golobokova L.S., Miroshnichenko I.B., Effectiveness of forming of the shock waves created by optical breakdowns on the surface of solid bodies, Opt. Atmosf. Okeana, 25, 5, pp. 448-450, (2012)

[4]

Breig E.L., Limitations on the atmospheric thermal effects for high-power CO2 laser beams, J. Opt. Soc. Am., 62, 4, pp. 518-528, (1972)

[5]

Zuev V.E., Zemlyanov A.A., Kopytin Y.D., Nonlinear Optics of Atmosphere, (1989)

[6]

Geints Y.E., Grachev G.N., Zemlyanov A.A., Kabanov A.M., Pavlov A.A., Ponomarenko A.G., Tishchenko V.N., Thermal self-action of high-power continuous and pulse-periodic SO2 laser radiation in air: I. Numerical simulation of atmospheric path propagation, Atmos. Ocean. Opt., 27, 2, pp. 147-153, (2014)

[7]

Ageev B.G., Ponomarev Y.N., Chistyakova L.K., Study of pulse CO2 laser absorption by air and carbon dioxide, Izv. Vuzov, Fiz., No. 10, pp. 49-51, (1982)

[8]

Pavlov A.A., Pavlov A.A., Golubev, “Some aspects of Schlieren technique sensitivity increasing,” in Proc. of the 16th International Sympos. on Applications of Laser Techniques to Fluid Mechanics (ISALTFM 2012), Portugal, Lisbon, 9–12 Jul., pp. 1-14, (2012)

[9]

Gordiets B.F., Osipov A.I., Khokhlov R.V., Gas cooling during propagation of high-power CO2 laser radiation though the atmosphere, Zh. Tekh. Fiz., 44, 5, pp. 1063-1069, (1974)

[10]

Netesov V.V., Effect of kinetics of molecular absorption of radiation on the propagation of a pulse with λ = 10.6 μm in the atmosphere, J. Appl. Mech. Techn. Phys., 27, 4, pp. 473-478, (1986)

← 1 2 →