Author:
Feng Chengyong,Holcomb Robert,Jenkins Gregory W.,Dorrer Christophe,Bromage Jake
Abstract
We introduce cascaded quadratic nonlinearities in the regenerative amplifier to enable simultaneous ultrashort-pulse amplification and spectral broadening with positive or negative net nonlinearity. We demonstrate a nonlinearity-tunable Yb:YAG thin-disk regenerative amplifier producing millijoule-level, sub-200-fs pulses.