A simple method for pulse contrast enhancement via self-focusing
Zaharit Refaeli,
Gilad Marcus,
Yariv Shamir
Abstract:Here we report on a simple-to-implement and cost-effective approach for laser pulse contrast enhancement, based on the χ (3) nonlinear self-focusing effect. An intentionally induced and gently controlled self-focusing in a thin glass transforms the time-dependent intensity into variation in beam divergence. Followed by a spatial discriminating filter, only the strongly focused fraction traverses the setup, at the expense of efficiency. A numerical model, accounting for the pulse and material parameters via a G… Show more
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