Ultrabroad supercontinuum generation by femtosecond dual-wavelength pumping in sapphire.
We study supercontinuum (SC) generation in sapphire pumped by two femtosecond lasers with dual wavelengths of 800 nm and 1054 nm. In comparison with the case pumped by single-wavelength pulses, the conversion efficiencies in the visible and infrared regions are enhanced by almost an order of magnitude, and the SC spectrum can be much flatter with dual-wavelength pulses pumping. The ultrabroad SC spanning from 350 nm to 1600 nm is obtained experimentally, which covers an octave of the pumping wavelengths.
Wang
Ke
K
Qian
Liejia
L
Luo
Hang
H
Yuan
Peng
P
Zhu
Heyuan
H