Numerical Analysis of Destructive Interference Effect Due to Nonlinear Law of Reflection in a Wedge Shaped Zinc Telluride Slab for Total Internal Reflection Quasi Phase Matching Basesd Broadband Second Harmonic Generation

摘要

In this paper the destructive interference effect due to nonlinear law of reflection has been analyzed numerically in a wedge shaped zinc telluride slab for total internal reflection quasi-phase matching based second harmonic generation, using ppp polarization configuration. The computer aided simulation indicates 3 dB bandwidth of 360 nm, centred at 8.292 μm, with conversion efficiency of 8.27 %. When the destructive interference effect due to nonlinear law of reflection alongwith various optical losses are considered, the peak second harmonic conversion efficiency sharply reduces to 1.5 % with a corresponding 3 dB bandwidth of 351 nm, centred at 8.247 μm.