Abstract
The propagation of a filamentary laser beam at an air-glass surface
is studied by setting the incident angle satisfying the total reflection
condition. The images of the trajectory of the filamentary laser beam
inside the sample and the output far-field spatial profiles are measured
with varying incident laser pulse energies. Different from the general
total reflection, a transmitted laser beam is detected along the
propagation direction of the incident laser beam. The energy ratio of the
transmitted laser beam depends on the pulse energies of the incident laser
beam. The background energy reservoir surrounding the filament core can
break the law of total reflection at the air-glass surface, resulting in
the regeneration of the transmitted laser beam.
© 2016 Chinese Laser Press
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