High-power operation of continuous wave Cr~(4+):forsterite laser: exciting state absorption versus crystal temperature

摘要

We study temperature and pump power dependence of fluorescence in Cr~(4+):forsterite crystal. We find that the luminescence yield has a strong temperature and pump power dependence. We also observe two-photon fluorescence induced by continuous wave pumping of Cr~(4+):forsterite and study its temperature behavior as well. The obtained results are used as a guidance to construct high-power, high energy femtosecond Cr~(4+):forsterite oscillator.