We report the performance of a periodically poled lithium niobate (PPLN) crystal inside a diode-pumped Nd:YVO4 laser for simultaneous laser Q switching and optical parametric oscillation. The monolithic PPLN crystal consists of two sections, a 1-cm-long 14-µm-period electrode-coated section and a 4-cm-long 30-µm-period section, functioning as a low-voltage Pockels cell and a quasi-phase-matched parametric gain medium, respectively. At a 150-VQ-switching voltage and a 6-kHz switching rate, we measured 25-µJ pulse energy and 4-kW peak power at 1.55 µm with 9-W absorbed diode power.
© 2005 Optical Society of America
Y. H. Chen, Y. Y. Lin, C. H. Chen, and Y. C. Huang, "Monolithic quasi-phase-matched nonlinear crystal for simultaneous laser Q switching and parametric oscillation in a Nd:YVO4 laser," Opt. Lett. 30, 1045-1047 (2005)