Restoration of blurred images due to phase distortion based on polarization-insensitive phase conjugation in second-order nonlinear medium

Abstract

Broadband and polarization-insensitive phase conjugation, achieved based on difference-frequency generation in a second-order nonlinear composite consisting of stacked KTiOPO(4) (KTP) plates, was exploited to restore blurred images due to phase distortion as a novel scheme. Due to the quasi-phase matching in the stacked KTP crystals, our result reveals that the image restoration is insensitive to the polarization direction and wavelength of the input beam.

Restoration of blurred images based on phase conjugation by using single second-order nonlinear parametric processes

“…In this section, we review our previous experimental result on the restoration of the blurred images caused by the phase distortion [16].…”

“…In this proceedings article, we review our theoretical [15] and experimental [16] progresses made on restoration of the blurred images based on optical phase conjugation.…”

A Novel Hierarchical Nanostructure for Enhanced Optical Nonlinearity Based on Scattering Mechanism

“…first observed the second harmonic generation in single crystalline quartz in 1961, [ 8 ] tremendous exciting results have been obtained based on various NOMs towards a variety of applications. In general, NOMs can be basically classified into second‐order (LiNbO 3 , [ 9 ] LiTaO 3 , [ 10 ] KTP [ 11 ] ), third‐order (lnSb, [ 12 ] Si [ 13 ] ), and higher‐order materials. The third‐order nonlinear nonlinearities are not restricted by specific lattice structures and have wide applications ranging from all‐optical switches, [ 14 ] optical interconnects [ 15,16 ] to optical memories.…”