Abstract

It is generally known that the traditional quasi-phase-matching (QPM) condition is deduced under the pump undepleted approximation. Practically, the energy transfer between the fundamental wave (FW) and the harmonic waves should be considered because of the FW depletion. Several methods have been investigated to study this problem, in which the main attention was focused on the perfect phase matching for high conversion efficiency under the pump depletion condition. For the phase-shift manipulation in this situation, few attention has been drawn. In this paper, we employed an intuitive and simple method to study the nonlinear optical interactions with pump depletion. We obtained an optical superlattice(OSL) for the perfect phase matching with pump depletion; furthermore, we analyzed the manipulation of the energy transfer and phase-shift during the nonlinear process; and four different rigorous conditions were derived for various purposes.

© 2017 Optical Society of America