Abstract
• 1.4 MW peak power, 28 mJ pulse energy, KTP-based optical parametric oscillator. • Detailed theoretical description of KTP Type-II choice as parametric generator. • Great potential for an “eye-safe” target illumination device. We demonstrate MW-level, single resonance optical parametric oscillator, based on KTP Type-II crystal with noncritical phase-matching. The OPO is pumped by electro-optically Q-switched Nd:YAG slab laser providing 55 mJ of pulse energy. At the output, we achieved 28 mJ of signal pulse energy at 1.57 μm with 51% conversion efficiency, corresponding to 1.4 MW of peak power.
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