Abstract
In this paper we present the development of a KTA singly resonant optical parametric oscillator (OPO) with an unstable resonator. The OPO was pumped by a standard lamp-pumped, Q- switched, Nd:YAG laser (Continuum Surelight I) with 450 mJ output pulse energy in 5 ns pulses and 10 Hz repetition rate. The OPO was singly resonant for the idler wavelength, had an unstable resonator and was designed for optimal idler output energy of 30 mJ at 2.9 μm while minimising the linewidth of the free running OPO.
© 2002 Optical Society of America
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