Abstract
Terahertz parametric oscillator (TPO) using periodically inverted GaP stacks (PIGaPS) as gain medium with a quasi-phase-matching scheme is investigated. The frequency tuning characteristics of terahertz wave (THz-wave) are analyzed by varying the grating period of PIGaPS and the pump wavelength. Gain and absorption characteristics of THz-wave are also investigated. The characteristics of PIGaPS and periodically poled LiNbO 3 (PPLN) are compared when the two crystals used as gain medium for TPO. The analyses indicate that PIGaPS is more suitable than PPLN are used as the gain medium for TPO.
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