B. Galagan

Luminescent and laser properties of Yb–Er:GdCa4O(BO3)3: a new crystal for eye-safe 1.5-μm lasers

F. Laurell, F. Laurell, L. Ivleva, 2004 .

Passive Q-switching at 1.54 μm of an Er–Yb: GdCa4O(BO3)3 laser with a Co2+: MgAl2O4 saturable absorber

F. Laurell, V. Pasiskevicius, J. Hellström, 2005 .