Crystal Structure Study of (Ca, Gd)2(Al, Ti)O4

Efficient Yb^3+:CaGdAlO_4 bulk and femtosecond-laser-written waveguide lasers

“…Therefore, we used a combination of the McCumber-relation [14] and the Füchtbauer−Ladenburg method (FL) as described in [15] for the determination of the emission cross sections. Because of the disordered nature of the CALGO host, where Yb 3 occupies the C 4V site shared by Ca 2 and Gd 3 ions [16], the energetic position of the Stark levels cannot be measured properly. Hence the spectra resulting from the McCumber relation were calibrated with the FL-emission cross sections at 1050 nm, where no reabsorption is expected.…”