Development of the oxyborate Nd<SUP>3+</SUP>:YCOB has brought about the realization of single crystal elements under diode pumped operation for compact simple, solid state lasers producing visible laser emission. Efficient laser action and self-frequency doubling (SFD) has been obtained for both Ti:Sapphire and diode pumped operations. Comparable results were obtained for a hemispherical linear cavity with a 2% output coupler for fundamental operation. The fundamental output power of the Nd:YCOB under Ti:Sapphire pumping was in excess of 400 mW with a slope efficiency of 44% with approximately 1 W absorbed. Utilizing high brightness laser diodes, over 350 mW of fundamental output power has been obtained with a slope efficiency of 51% for similar absorbed powers. Efficient SFD operation was demonstrated in both pumping modes with no output coupling at the fundamental wavelength and high transmission of the second harmonic using a 5% doped Nd:YCOB crystal. Output powers of approximately 60 mW at 530 nm were obtained with both Ti:Sapphire and laser diode pumping.