We report on the experimental achievements of a high power, high efficiency Tm:YAlO<sub>3</sub> laser repetitively Q-switched at 10 kHz used to drive a ZnGeP<sub>2</sub> OPO. The system is run with room temperature components and achieves over 3 W at 3-5 μm with an efficiency of 5% starting from the pump diode. A two crystal resonator design allows tuning over multiple spectral peaks or alternately as an ultra broad spectral source.

© 2003 Optical Society of America

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