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This paper reports an intracavity terahertz parametric source based on the stimulated polariton scattering in RbTiOPO 4 crystal with a high repetition rate and a high average power. The side pumping for the gain medium by laser diodes is adopted to get a higher fundamental power and a larger fundamental laser beam size than those in the diode-end-pumping in order to improve the THz output power. A non-collinear convex-plane fundamental cavity is adopted so that the thermal effect can be offsetdoi:10.1109/jphot.2020.2981527 fatcat:zl5p5j3zvzffrjxcc6ubyyha2y