Investigation on terahertz parametric oscillators using GaP crystal with a noncollinear phase-matching scheme

AbstractTerahertz parametric oscillator (TPO) using GaP as gain medium with a noncollinear phase-matching scheme is investigated. Frequency-tuning characteristics of the terahertz wave (THz-wave) by varying the phase-matching angle and pump wavelength are analyzed. Gain and absorption characteristics of the THz-wave are investigated. The characteristics of GaP and LiNbO3 (LN) are compared when the two crystals are used as gain medium for TPO. The analyses indicate that GaP is more suitable than LN to be used as gain medium for TPO.Keywords: terahertz parametric oscillatornoncollinear phase-matchingGaP Additional informationFundingFunding. This work was supported by the National Natural Science Foundation of China [grant numbers 61201101, 61205003, and 61172010] and Basic Research Projects and Advanced Technology of Henan Province [grant number 112300410326].