Abstract
Here we demonstrate filamentation and generation of intense white light supercontinuum from a weakly focused femtosecond Ti:Sapphire laser pulses modified by a partial laser beam blocking by the knife edge. Though the spectral broadening of the filamented laser pulses was observed both in the blue and red sides of the fundamental wavelength, most distinct was the broadband white-light emission covering the whole visible spectral range. The dominant filamentation and supercontinuum generation enhancement mechanism was found to be the diffraction-induced laser beam intensity modification.
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