Pentagon-shaped O-0-cut BaTiO3 as an efficient self-pumped phase conjugator

A pentagon-shaped 0 degrees-cut undoped BaTiO3 crystal was used to construc t a high-quality self-pumped phase conjugator. The conjugator shows a stead y phase-conjugate output with a high reflectivity (as high as similar to 68 %), a fast rising time, and a large angular range of acceptance. It also sh ows a good fidelity in the phase-conjugate reconstructed image; the resolut ion reaches 17 mu m. America.