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Title: Formation of conical emission of supercontinuum during filamentation of femtosecond laser radiation in fused silica

Abstract

The formation of conical emission of supercontinuum during filamentation of femtosecond laser pulses with central wavelengths in a wide range is studied experimentally, numerically, and analytically. The frequency-angular intensity distribution of the spectral components of conical emission is determined by the interference of supercontinuum emission in a filament of a femtosecond laser pulse. The interference of supercontinuum emission has a general character, exists at different regimes of group velocity dispersion, gives rise to the fine spectral structure after the pulse splitting into subpulses and the formation of a distributed supercontinuum source in an extended filament, and causes the decomposition of the continuous spectrum of conical emission into many high-contrast maxima after pulse refocusing in the filament. In spectroscopic studies with a tunable femtosecond radiation source based on a TOPAS parametric amplifier, we used an original scheme with a wedge fused silica sample. Numerical simulations have been performed using a system of equations of nonlinear-optical interaction of laser radiation under conditions of diffraction, wave nonstationarity, and material dispersion in fused silica. The analytic study is based on the interference model of formation of conical emission by supercontinuum sources moving in a filament.

Authors:
; ;  [1]; ;  [2]
  1. Moscow State University (Russian Federation)
  2. Russian Academy of Sciences, Institute of Spectroscopy (Russian Federation)
Publication Date:
OSTI Identifier:
22028025
Resource Type:
Journal Article
Journal Name:
Journal of Experimental and Theoretical Physics
Additional Journal Information:
Journal Volume: 113; Journal Issue: 3; Other Information: Copyright (c) 2011 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1063-7761
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COMPUTERIZED SIMULATION; DECOMPOSITION; DIFFRACTION; EMISSION; EMISSION SPECTRA; FILAMENTS; INTERFERENCE; LASER RADIATION; NONLINEAR PROBLEMS; PARAMETRIC AMPLIFIERS; PULSES; SILICA

Citation Formats

Kandidov, V. P., E-mail: kandidov@physics.msu.ru, Smetanina, E. O., Dormidonov, A. E., Kompanets, V. O., and Chekalin, S. V. Formation of conical emission of supercontinuum during filamentation of femtosecond laser radiation in fused silica. United States: N. p., 2011. Web. doi:10.1134/S1063776111080073.
Kandidov, V. P., E-mail: kandidov@physics.msu.ru, Smetanina, E. O., Dormidonov, A. E., Kompanets, V. O., & Chekalin, S. V. Formation of conical emission of supercontinuum during filamentation of femtosecond laser radiation in fused silica. United States. doi:10.1134/S1063776111080073.
Kandidov, V. P., E-mail: kandidov@physics.msu.ru, Smetanina, E. O., Dormidonov, A. E., Kompanets, V. O., and Chekalin, S. V. Thu . "Formation of conical emission of supercontinuum during filamentation of femtosecond laser radiation in fused silica". United States. doi:10.1134/S1063776111080073.
@article{osti_22028025,
title = {Formation of conical emission of supercontinuum during filamentation of femtosecond laser radiation in fused silica},
author = {Kandidov, V. P., E-mail: kandidov@physics.msu.ru and Smetanina, E. O. and Dormidonov, A. E. and Kompanets, V. O. and Chekalin, S. V.},
abstractNote = {The formation of conical emission of supercontinuum during filamentation of femtosecond laser pulses with central wavelengths in a wide range is studied experimentally, numerically, and analytically. The frequency-angular intensity distribution of the spectral components of conical emission is determined by the interference of supercontinuum emission in a filament of a femtosecond laser pulse. The interference of supercontinuum emission has a general character, exists at different regimes of group velocity dispersion, gives rise to the fine spectral structure after the pulse splitting into subpulses and the formation of a distributed supercontinuum source in an extended filament, and causes the decomposition of the continuous spectrum of conical emission into many high-contrast maxima after pulse refocusing in the filament. In spectroscopic studies with a tunable femtosecond radiation source based on a TOPAS parametric amplifier, we used an original scheme with a wedge fused silica sample. Numerical simulations have been performed using a system of equations of nonlinear-optical interaction of laser radiation under conditions of diffraction, wave nonstationarity, and material dispersion in fused silica. The analytic study is based on the interference model of formation of conical emission by supercontinuum sources moving in a filament.},
doi = {10.1134/S1063776111080073},
journal = {Journal of Experimental and Theoretical Physics},
issn = {1063-7761},
number = 3,
volume = 113,
place = {United States},
year = {2011},
month = {9}
}