Abstract

We demonstrate an efficient cw 976-nm-diode-pumped Yb3+:Ca4GdO(BO3)3 laser. At room temperature we obtained 814 mW of power with a slope efficiency of 77% and a small-signal gain per round trip of 1.67. We also demonstrate that the Yb3+:Ca4LnO(BO3)3 (Ln=Gd, Y) crystals are suitable for a plano–plano microchip-type cavity. With this microlaser we have obtained an average power of 300 mW, which corresponds to an optical–optical conversion efficiency of 27%.

© 2000 Optical Society of America

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