Giantically blue-shifted visible light in femtosecond mid-IR filament in fluorides

TL;DR

This paper reports the discovery of a giant blue shift in the visible spectrum of supercontinuum generated by mid-IR femtosecond laser filaments in fluoride materials, revealing new nonlinear optical phenomena.

Contribution

It introduces the observation of an unprecedented giant blue shift in supercontinuum spectra within fluoride filaments, expanding understanding of filamentation and supercontinuum generation.

Findings

Giant blue shift observed in supercontinuum spectrum

Blue shift occurs in single filament regime

Shift linked to mid-IR femtosecond laser pulses

Abstract

A giant blue shift of an isolated visible band of supercontinuum was discovered and studied in the single filament regime of Mid-IR femtosecond laser pulse at powers slightly exceeding critical power for self-focusing in fluorides.