Spectral, Spatial and Energy Stabilization of Filament Supercontinuum Stokes wing by Amplitude Modulation

We demonstrate that modulation of the initial beam by a simple four-hole amplitude mask allows to enhance pulse-to-pulse stability of the red wing of filament-generated supercontinuum. In particular, we focus our attention on the spectral position and width, angular coordinate and energy of the brig...

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Bibliographic Details
Main Authors: Pushkarev, D.V., Zhidovtsev, N.A., Uryupina, D.S., Mitina, E.V., Volkov, R.V., Savel'Ev, A.B.
Format: Conference Proceeding
Language:English
Subjects:
Amplitude modulation
angle-wavelength spectra
femtosecond filamentation
Laser beams
Laser stability
light bullet
multifilamentation
Ultrafast optics
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Summary:We demonstrate that modulation of the initial beam by a simple four-hole amplitude mask allows to enhance pulse-to-pulse stability of the red wing of filament-generated supercontinuum. In particular, we focus our attention on the spectral position and width, angular coordinate and energy of the brightest red-shifted maximum in the spectrum of a loosely-focused filament in air. This maximum, corresponding to a Raman bullet, bears about 40 \% of the initial pulse energy and is of interest for applications. The enhancement in pulse-to-pulse stability of the bullet parameters reaches 1.7 times for the bullet spectral position and width, 3.4 times for its angular position and 4.5 times for its energy.
ISSN:2642-5580
DOI:10.1109/ICLO59702.2024.10624302