A Supercontinuum Generator with Pumping by Pulses of Chromium–Forsterite-Based Femtosecond Laser in Transparent Condensed Media

A facility for generating a supercontinuum in Al2O3 and CaF2 crystals using a femtosecond laser, which is based on a chromium–forsterite (Cr : F) crystal, is described. The supercontinuum spectra under pumping at four wavelengths of 310, 413, 620, and 1240 nm were determined. A continuous spectrum of a supercontinuum from 324 to 1000 nm was obtained in the visible region, thus making it possible to study various samples using the pump–probe system. In the UV spectrum region, the shortest wavelength of a supercontinuum (225 nm) was obtained on the CaF2 crystal when pumped with pulses at a wavelength of 310 nm.