Spectral broadening induced by intense ultra-short pulse in 4H

Spectral broadening induced by intense ultra-short pulse in 4H–SiC crystals

Xu Chun-hua¹, Yan Teng-fei², Wang Gang¹, Wang Wen-jun¹, Liang Jing-kui¹, Chen Xiao-long^{1, 3, †,}

FWHM of the broadening spectrum versus the peak power density of the incident beam. The dots (solid symbols) indicate the experimental data and are fitted by a linear dependence. The dot (hollow circle) shows the FWHM (188 cm⁻¹) of output laser without SiC crystals.