Abstract
We report optical parametric oscillators (OPO) based on periodically poled KTiOPO4, pumped by nanosecond 532 nm pulses, and capable of delivering 5 mJ pulse energy. The OPO output could be tuned from 756–771 nm (signal) and 1.72–1.80 µm (idler), with peak efficiencies of up to 37% (signal) and 8% (idler). Monolithic OPO oscillation and single frequency operation with an instrument limited optical bandwidth of 250 MHz are also demonstrated.
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