Abstract
Spectroscopic properties and self-frequency-doubling laser performance are presented for Yb:YCa4O(BO3)3 (Yb:YCOB) crystals oriented for type I second-harmonic generation in the ZX plane. In a plane-concave cavity 10cm long, up to 330mW of green light (544.5nm) is obtained for 14.7W of laser diode incident pump power. Broad emission bands and weak anisotropy in the 1060-1100nm range between the two eigenstates of polarization may explain the instability of the self-frequency-doubled output power.
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