Resonance absorption initiated by self-focusing filamentation
نویسندگان
چکیده
منابع مشابه
Enhancement of filamentation postcompression by astigmatic focusing.
The energy scaling up of pulse postcompression is still an open issue. In this work we analyze the use of astigmatic focusing to improve the output pulses in a filamentation based postcompression setup. Unlike spherical conditions, astigmatic focusing enhances the output energy and the spectral broadening of the filament. This is due to the increase of critical power, allowing a considerable im...
متن کاملEffect of linear absorption on self-focusing.
We report the effect of linear absorption on self-focusing. Our experimental results show that power loss due to linear absorption before focus is responsible for the increase in the threshold power for self-focusing and that the critical power is independent of the linear absorption.
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The standard explanation for multiple filamentation of laser beams is that breakup of cylindrical symmetry is initiated by noise in the input beam. In this study we propose an alternative deterministic explanation based on vectorial effects. We derive a scalar equation from the vector Helmholtz equation that describes self-focusing in the presence of vectorial and nonparaxial effects. Numerical...
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Intense lasers have applications in medicine (e.g., laser surgery), communications, remote sensing of the atmosphere, and more. When an intense laser beam propagates in a Kerr medium, such as air, water, or glass, the beam can become a long and very narrow filament as a result of its nonlinear interaction with the medium, a phenomenon called self-focusing. Laser experiments since the 1960’s sho...
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ژورنال
عنوان ژورنال: Laser and Particle Beams
سال: 1986
ISSN: 0263-0346,1469-803X
DOI: 10.1017/s0263034600001786