scholarly journals Dipole–Dipole Broadening in the Selective Reflection of an Intense Laser Beam from the Interface between a Transparent Dielectric and a Dense Resonance Gas

JETP Letters ◽  
2021 ◽  
Vol 114 (9) ◽  
pp. 524-527
Author(s):  
A. A. Bobrov ◽  
S. A. Saakyan ◽  
V. A. Sautenkov ◽  
B. B. Zelener

The dipole–dipole broadening of the spectrum of the selective reflection of intense resonance light from the interface between a transparent dielectric and a gas of the natural mixture of Rb isotopes has been studied experimentally. The case of a high gas density where the Doppler broadening can be neglected has been investigated. It has been shown that dipole–dipole broadening is reduced with increasing the number density of excited atoms. When the laser beam intensity is much higher than the saturation intensity of a resonance transition, a significant broadening due to the very high laser beam intensity has not been observed in the reflection spectrum from the transparent dielectric/gas interface. The observed intensity dependence of the spectral width has been explained by the quenching collisions of the excited atoms with the interface.

Author(s):  
O Donţu ◽  
S Ganatsios ◽  
D Duminica

The paper presents some remarks about the way in which the thermal deformation in the solid active laser medium influences the radial distribution of the emitted laser beam intensity, implicitly the processing parameters.


1995 ◽  
Author(s):  
I. P. Bashkatov ◽  
A. Y. Goltsov ◽  
A. N. Kolomiyskii ◽  
N. G. Kovalskii ◽  
V. V. Kryzhko ◽  
...  

2017 ◽  
Vol 35 (4) ◽  
pp. 722-729
Author(s):  
S. Kumar ◽  
P. K. Gupta ◽  
R. K. Singh ◽  
R. Uma ◽  
R. P. Sharma

AbstractThe study proposes a semi-analytical model for the pulse compression of two co-propagating intense laser beams having Gaussian intensity profile in the temporal domain. The high power laser beams create the relativistic nonlinearity during propagation in plasma, which leads to the modification of the refractive index profile. The co-propagating laser beams get self- compressed by virtue of group velocity dispersion and induced nonlinearity. The induced nonlinearity in the plasma broadens the frequency spectrum of the pulse via self-phase modulation, turn to shorter the pulse duration and enhancement of laser beam intensity. The nonlinear Schrodinger equations were set up for co-propagating laser beams in plasmas and have been solved in Matlab by considering paraxial approximation. The propagation characteristics of both laser beams inside plasma are divided into three regions through the critical divider curve, which has been plotted between pulse width τ01 and laser beam power P01. Based on the preferred value of critical parameters, these regions are oscillatory compression, oscillatory broadening, and steady broadening. In findings, it is observed that the compression of the laser beam depends on the combined intensity of both beams, plasma density, and initial pulse width.


1997 ◽  
Vol 36 (30) ◽  
pp. 7689 ◽  
Author(s):  
Koshichi Nemoto ◽  
Takuya Nayuki ◽  
Takashi Fujii ◽  
Naohiko Goto ◽  
Yoshi-kazu Kanai

2021 ◽  
Author(s):  
Raghul Manosh Kumar ◽  
SUBODH ADHIKARI ◽  
Oleksandr Bibik ◽  
Benjamin Emerson ◽  
Christopher Fugger ◽  
...  

1992 ◽  
Vol 91 (3-4) ◽  
pp. 193-196 ◽  
Author(s):  
A.V. Dooghin ◽  
N.D. Kundikova ◽  
B.Ya. Zel'dovich

2007 ◽  
Vol 52 (7) ◽  
pp. 907-910
Author(s):  
F. V. Bulygin ◽  
I. V. Goryainova ◽  
A. A. Kovalev ◽  
K. D. Maramzin

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