Continuously tunable terahertz parametric generation in KTP crystal with pulse-seed injection

A continuously tunable injection pulse-seeded terahertz parametric generator based on KTP crystal has been demonstrated in this work. The terahertz tuning range was from 2.80 THz to 6.24 THz and the maximum terahertz output was 4.59 μJ at 4.42 THz. Compared with the traditional KTP terahertz parametric oscillator with discontinuous frequency tuning, the KTP ips-TPG has significance improvement in the tuning range and THz output energy.