High-energy, continuously tunable intracavity terahertz-wave parametric oscillator

摘要

We have demonstrated an intracavity THz optical oscillator pumped by a diode-side-pumped Q-switched Nd:YAG laser. Based on a noncollinear phase matching geometry in the nonlinear crystal MgO:LiNbO{sub}3, high-energy, low-threshold, coherent tunable Stokes light is obtained by changing the angle between the resonated idler wave and the pump wave, which means that the widely tunable, high-energy, coherent THz radiation is also generated. The tuning range for Stokes wave is 1069.4-1073.4nm, corresponding to the THz frequency range of 1.4-2.5THz. The phenomenon of the coherent tunable second-order Stokes light scattering is also observed.