DOI: 10.1364/AO.44.007458
关键词:
摘要: The multiconversion processes in optical parametric oscillators based on periodically poled LiNbO3 are investigated. Interpretations simultaneous quasi- and birefringent phase matching presented. Three three harmonic generation a multigrating crystal were observed. Two of the two harmonics quasi-phase matched, other conversion matched through birefringence crystal. primary process (omegap --> omegas + omegai) was obtained first-order matching. quasi-phase-matched occurred within higher orders. existence even-order is due to than 50% duty-cycle grating periods. tuning range for each generated waves compared with theoretical fittings.