Phase conjugation of broadband light at three-wave mixing in a nonlinear crystal

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

“…Due to the presence of the signals and idlers having perpendicular polarizations, such a nonlinear process is insensitive to the polarization of the input beam. In the past, theoretical and experimental studies of three-wave interaction had been investigated in different nonlinear crystals, such as theoretical study of difference-frequency generation (DFG) in β-BaB 2 O 4 (BBO) for different angles between the input and pump beams [10], experimental and simulation work on the quality of phase conjugate affected by the flatness of pump wave front [11], and phase conjugated beams generated by a transversely pump beam [12,13]. However, all of them suffer from a major disadvantage, i.e.…”

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

“…Due to the presence of signals and idlers having perpendicular polarizations, such a nonlinear process is insensitive to the polarization of the input beam. In the past, theoretical and experimental studies of three-wave interaction have been investigated in different nonlinear crystals, such as theoretical study of difference-frequency generation (DFG) in β-BaB 2 O 4 (BBO) for different angles between the input and pump beams [12], experimental and simulation work on the quality of phase conjugate affected by the flatness of the pump wave front [13], and phaseconjugated beams generated by a transversely pump beam [14,15]. However, all of them suffer from a major disadvantage; i.e., the nonlinear process is sensitive to the polarizations of the waves participating in the nonlinear interactions.…”