title: Efficient nanosecond optical parametric oscillators based on periodically poled KTP emitting in the 1.8-2.5-mum spectral region.
abstract: The use of periodically poled KTiOPO(4) as a gain medium in efficient nanosecond optical parametric oscillators pumped by a flash-lamp-pumped Q-switched Nd:YAG laser is demonstrated. Parametric radiation in the 1.8-2.5-mu m spectral region was achieved when the crystal temperature was tuned from 10 to 100 degrees C. A maximum total output energy of 1.8 mJ was obtained at a pump level of 3.5 mJ. Stable operation was achieved, with conversion efficiencies reaching 50%. No gray tracking or laser damage was observed, even for pump intensities of 450MW/cm(2).
authors: J
authors: J
authors: Hellström
authors: V
authors: V
authors: Pasiskevicius
authors: F
authors: F
authors: Laurell
authors: H
authors: H
authors: Karlsson