The stimulated emission cross section of a 1.1-at.% doped Nd:Gd3xY 3(1−x) Sc2Ga 3(1+δ) O12 (x = 0 -1, δ = -0.2 -0.2) (Nd:GYSGG) crystal at 1.06 µm ( 4 F 3/2 → 4 I 11/2 transition) is measured at room temperature, using both the laser efficiency comparison method with an Nd:Y3Al5O12 (Nd:YAG) laser and the threshold formula method, with their results of 1.59×10 −19 and 1.50×10 −19 cm 2 , respectively. The measured results accord well with each other and they are of great use in designing a Nd:GYSGG laser system.

The continuous wave (CW) laser performance of Nd:GYSGG at 1104 nm is investigated for the first time, to our knowledge. A CW laser output power of 4.7 W is obtained when the pump power of the 808 nm fiber coupled laser diode is 19.1 W, corresponding to a conversion efficiency of 24.6% and slope efficiency of 37%.