Continuous-Wave Backward Frequency Doubling in Periodically Poled Lithium Niobate

S. Stivala, A. C. Busacca, L. Curcio, R. L. Oliveri, S. Riva-Sanseverino and G. Assanto

Appl. Phys. Lett. 96, 111110 (2010)

Abstract:

We report on backward second-harmonic-generation in bulk periodically poled congruent lithium niobate with a 3.2Mu m period. A tunable continuous-wave Ti:sapphire laser allowed us exciting two resonant quasi-phase-matching orders in the backward configuration. The resonances were also resolved by temperature tuning and interpolated with standard theory to extract relevant information on the sample.