Abstract

The quasi-periodic optical superlattice is a promising material for use in optical frequency conversion. We propose a method for designing a quasi-periodic structure for efficient third-harmonic generation (THG) at any given wavelength. With this method we have made a ${\mathrm{LiTaO}}_3$ sample in which 27% THG at $0.48 \mu \mathrm{m}$ was achieved, together with a series of highly efficient multiwavelength second-harmonic generation outputs. The result is in good agreement with the theoretical prediction.

© 2001 Optical Society of America

Highly efficient direct third-harmonic generation based on control of the electro-optic effect in quasi-periodic optical superlattices

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