Dual signal-wave parametric oscillation using PPLN for generating THz-waves from DAST crystal

摘要

Summary form only given. Optical parametric oscillators (OPOs) have been used extensively as coherent tunable light sources because of their wide tunability and high efficiency. In OPOs, quasi-phase-matching (QPM) is an alternative to conventional birefringent phase-matching. Periodically poled LiNbO/sub 3/ (PPLN) is widely used in QPM because of its large nonlinear coefficients, wide transparent range, and desirable phase-matching characteristics. The design of PPLN is not limited to a single grating period, so that it is possible to fabricate complicated structures for specialized phase matching using lithographic masks. We report on the operation of a dual signal-wave (DSW) QPM-OPO with cascade gratings.