Abstract

Quasi-phase-matched (QPM) waveguide devices have been widely studied due to their flexible frequency conversion abilities and potential applications in many areas Some analytical analyses [1] have been done to model the QPM second-order nonlinear effects using both the plane-wave and non-depleting pump approximation. However, precise analytical modeling of those QPM devices is quite difficult when large or irregular geometrical variations exist and the depletion of the pump energy is not negligible Therefore, we propose an iterative finite difference beam propagation method (IFD-BPM) to model and study the QPM second-order nonlinear effects in optical waveguides.

© 1998 IEEE