We observed parametric-generation efficiency of 1.61% from 1064 to 1071 nm and at 162 µm in a 0.5 mm thick, 45 mm long z-cut congruent lithium niobate waveguide with a pump energy of 2.2 mJ and a pump pulse width of 5.8 ns. We also measured an ultralow-threshold intensity of 70 MW/cm<sup>2</sup> for a 1064 nm pumped parametric oscillator resonating at 1071 nm and emitting at 162 µm with a 1 mm thick, 45 mm long lithium niobate waveguide.
© 2005 Optical Society of America
A. C. Chiang, T. D. Wang, Y. Y. Lin, S. T. Lin, H. H. Lee, Y. C. Huang, and Y. H. Chen, "Enhanced terahertz-wave parametric generation and oscillation in lithium niobate waveguides at terahertz frequencies," Opt. Lett. 30, 3392-3394 (2005)