Investigations of a plasma formed by ultrashort laser pulses

Basov, N G; Zakharov, Stanisłav D.; Крохин, О. Н.; Kryukov, P. G.; Senatskiĭ, Yu V; Tyurin, E. L.; Fedosimov, A I; Чекалин, С. В.; Shchelev, M. Ya.

doi:10.1070/qe1971v001n01abeh003010

Cited by 12 publications

(4 citation statements)

References 2 publications

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“…The élament parameters and critical power of laser radiation self-focusing in carbon disuléde were determined in [12] by measuring a change in the beam proéle with distance. The self-focusing of radiation in air was érst observed in [13] for a converging beam and in [14] for a collimated beam. In high-power-density radiation, small-scale self-focusing develops during which a laser beam splits due to the modulation instability of the intense light éeld in a medium with the Kerr nonlinearity [15].…”

Section: Introductionmentioning

confidence: 95%

Filamentation of high-power femtosecond laser radiation

2009

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The state of the art of investigations on élamentation of a high-power femtosecond laser radiation in transparent media is reviewed. The physical picture of this phenomenon is presented and its relation to the fundamental concepts of nonlinear optics and practical applications is demonstrated. Experimental and theoretical methods are brieêy considered and laser radiation parameters in the case of élamentation are given. The review can be of interest both

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Section: Introductionmentioning

confidence: 95%

Filamentation of high-power femtosecond laser radiation

2009

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“…This note stimulated other groups, in particular a French group at the CEA ("Commissariat à l'énergie atomique") who investigated, in close collaboration with an industrial company (CGE-Marcoussis), the nuclear reactions of fusion produced by a nanosecond laser pulse [18]. This was achieved one year after the first demonstration of this effect in Soviet Union by N. G. Basov's group with picosecond laser pulses [19]. Laser-induced fusion has now become a very broad field which is outside the scope of this paper.…”

Section: Subsequent Work On Higher-order Effectsmentioning

confidence: 91%

“…Spectrum of multiphoton RF resonances mF → mF + 1 observed in the ground state of optically pumped sodium atoms. The curves I, II, III correspond to increasing powers of the RF field (figure taken from ref [19]…”

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confidence: 99%

The Early Days of Quantum Optics in France

Cohen‐Tannoudji

2003

Coherence and Quantum Optics VIII

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We review a few early studies on atom-photon interactions which took place in France after World War II and before the seventies. Several examples are discussed, including double resonance and optical pumping, radiofrequency multiphoton processes, quantum interference effects in radiative processes, master equation description of atom-photon interactions, optical resonators and laser media, etc. We try to point out the continuity which exists between these early studies and more recent investigations in new research fields, such as laser cooling and trapping. Some general conclusions about science policy will be finally drawn from such a historical review. RésuméNous présentons quelques-unes des études initiales relatives aux interactions atome-photons qui ont été réalisées en France après la Seconde Guerre mondiale et avant les années 1970. Nous donnons plusieurs exemples, tels que la double résonance et le pompage optique, les processus multiphotoniques dans le domaine des radiofréquences, les interférences quantiques dans les processus radiatifs, la description en termes d'une équation maîtresse des interactions atome-photon, des résonateurs optiques, des milieux laser, etc. Nous essayons de souligner la continuité qui existe entre ces travaux précoces et les recherches ultérieures menées dans des domaines nouveaux, tels que le refroidissement et le piégeage des atomes par laser. Enfin, quelques considérations générales sur la politique de la recherche scientifique se dégagent de cette revue historique.

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“…In this case the efficiency of X-ray radiation k x reaches 0.1, i.e. around tenth time larger than that for hot expanding plasma produced by ultrashort/picosecond laser pulses on light/ fusion elements (Basov et al 1971).…”

Section: Generation Of X-rays In Cometsmentioning

confidence: 98%

Plasma astrophysics implication in discovery and interpretation of X-ray radiation from comets

Ibadov

2010

Proc. IAU

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Abstract. Discovery of soft X-ray radiation from comet Hyakutake C/1996 B2 by space telescope ROSAT in March 1996 as well as establishing the regularity of the phenomenon for comets in general opened a new area of research for the plasma astrophysics. The first soft X-ray observations have been motivated by the results of a theoretical investigation on the efficiency of production of energetic photons, in the energy range 0.1-1 keV, by hot plasma clumps generated in dusty comets via high velocity collision with interplanetary dust at small heliocentric distances. Moreover, the soft X-ray luminosities measured significantly exceeded the value predicted. A short review of proposed theoretical models and mechanisms for explaining X-ray emission from comets as well as some prospects for the future X ray observations of comets are presented.

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Investigations of a plasma formed by ultrashort laser pulses

Cited by 12 publications

References 2 publications

Filamentation of high-power femtosecond laser radiation

Filamentation of high-power femtosecond laser radiation

The Early Days of Quantum Optics in France

Plasma astrophysics implication in discovery and interpretation of X-ray radiation from comets

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