Laser emission from miniaturized NdAl 3 (BO 3 ) 4 crystals with directly applied mirrors

Laser emission from NdAl 3 (BO 3 ) 4 crystals of various thickness with directly applied laser mirrors was investigated on a polarization-dependent basis and time-resolved spectra were recorded. CW monomode operation with an output power of 5 mW was attained. Though NAB (NdAl 3 (BO 3 ) 4 should be electrooptic (space group R32 ), no electrooptic effect was observed by determining the mode shift from the influence of an electric field during laser operation.