Abstract

We report on continuous-wave and subnanosecond passively Q-switched laser oscillation from a NdAl3BO34 microchip laser operating at 1.06 µm. Efficient and stable laser operation is possible only when resonant pumping (I49/2F43/2 at 882 nm) is used instead of the traditional I49/2F45/2 (808 nm) pumping. The improvement in laser performance is caused by a strong reduction in the pump-induced thermal loading, which is achieved by pumping directly into the emitting level.

© 2005 Optical Society of America

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