Cascaded terahertz-wave generation efficiency in excess of the Manley–Rowe limit using a cavity phase-matched optical parametric oscillator

• DOI: 10.1364/josab.32.000617
• Publication Date: 2015-03-13T13:34:29Z
• Authors: Kyosuke Saito; Tadao Tanabe; Yutaka Oyama
• Keywords: Optical parametric amplifier; Optical power; Parametric oscillator

We describe a scheme for efficient terahertz (THz) generation using cascaded optical parametric oscillator GaP sheet cavity. By choosing an appropriate pump wavelength and cavity design, the cascading process contributes to THz-wave generation, resulting in high output peak power of 1.8 MW photon conversion efficiency 1.086 at 3 THz. This exceeds Manley–Rowe limit, method described here is applicable widely tunable high-power optically isotropic nonlinear material, such as GaAs, InP, ZnTe, or GaP. Our simulated data show that THz sources are possible suitable realization effects frequencies.