Abstract

Fabrication of a $5\mathrm{mm}$ thick periodically poled MgO-doped $\mathrm{Li}\mathrm{Nb}{\mathrm{O}}_3$ device with a $32.1\mu \mathrm{m}$ period for mid-infrared generation was demonstrated. The periodic structure was evaluated by measurement of second-harmonic generation with the $d_{31}$ coefficient. Optical parametric oscillation using this device with an uncoated $5\mathrm{mm}\times 5\mathrm{mm}$ aperture and a $36\mathrm{mm}$ effective length realized a high-energy output of $77\mathrm{mJ}$ for both signal (wavelength $1.83\mu \mathrm{m}$) and idler $\left(2.54\mu \mathrm{m}\right)$ waves with a 72% slope efficiency at $110\mathrm{mJ}$ pumping of a Q-switched Nd:YAG laser with a $12\mathrm{ns}$ pulse duration.

© 2005 Optical Society of America

High-energy quasi-phase-matched optical parametric oscillation in a 3-mm-thick periodically poled MgO:LiNbO₃ device

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