Nonlinear optical THz sources and applications (invited)

Among our research activities for high power THz sources, we can mention: Injection-seeded THz parametric generator (is-TPG); Cherenkov type phase matched optical rectification using LiNbO₃ ridge waveguide, and collinear phase matched optical rectification using DAST crystal, etc. Recently, we have succeeded in the development of a high-peak-power, single-longitudinal-mode and widely-tunable is-TPG using LiNbO₃ pumped by an amplified microchip Nd:YAG laser. The THz-wave output >1kW was assured by a calibrated pyroelectric detector. We also succeeded in a highly sensitive detection of THz-waves emitted from is-TPG using LiNbO₃ as a detector.