Abstract
Bulk periodically poled LiNbO3 crystal is a promising material for nonlinear optical devices using quasi-phase matching In particular, frequency doubling of near-infrared radiation into the blue spectra range and optical parametric oscillation are of importance. The spatial modulation of the nonlinear susceptibility is realized in lithium niobate by formation of periodically reversed domain pattern. In this work the periodic domain structure was formed in LiNbO3:Nd:Mg crystals by means of the modulation of impurity incorporation during the process of crystal growth. We investigated the correlation of ferroelectric domains with Nd-concentration modulation, and the nonlinear properties of the optical superlattice.
© 1998 IEEE
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