Rise in power of Yb:YCOB for green light generation by self-frequency doubling

Abstract

Spectroscopic properties and self-frequency-doubling laser performance are presented for $\mathrm{Yb}\text{:}{\mathrm{YCa}}_4\mathrm{O}{({\mathrm{BO}}_3)}_3$ (Yb:YCOB) crystals oriented for type I second-harmonic generation in the $ZX$ plane. In a plane-concave cavity 10 cm long, up to 330 mW of green light (544.5 nm) is obtained for 14.7 W of laser diode incident pump power. Broad emission bands and weak anisotropy in the 1060–1100 nm range between the two eigenstates of polarization may explain the instability of the self-frequency-doubled output power.

© 2016 Optical Society of America

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