“…The slope efficiency was calculated to be 21.6%. Compared with other CW laser output in molybdate or tungstate crystals, such as Nd:KY(MoO 4 ) 2 (0.43 W@1067 nm with slope efficiency = ∼71%), 68 Nd:CsGd(MoO 4 ) 2 (0.54 W@1066 nm with slope efficiency = ∼60.4%), 69 and Nd:KGd(WO 4 ) 2 (2.9 W@1067 nm with slope efficiency = ∼43%), 70 the lower output power and slope efficiency of Nd:BMO crystals can be partially attributed to the disordered crystal structure. In disordered crystals, only the sites with the highest gain contribute to the stimulated emission, and thus, the slope efficiency decreases.…”