Abstract
The frequency mixing effects in terahertz parametric oscillator (TPO) with a noncollinear phase-matching scheme based on bulk lithium niobate (LiNbO3), including sum frequency generation (SFG), difference-frequency generation (DFG), optical parametric oscillation and cascaded optical processes are investigated. The analysis results indicate that the terahertz wave (THz-wave) with N-times frequency can be generated simultaneously from frequency mixing effects in TPO with noncollinear phase-matching scheme. To our best knowledge, this is the first study of the TPO generating THz-wave with N-times frequency in bulk LiNbO3. The frequency tuning characteristics of THz-waves via varying pump wavelength, phase-matching angle and working temperature are theoretically analyzed.
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