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

A pentagon-shaped 0 degrees-cut undoped BaTiO(3) crystal was used to construct a high-quality self-pumped phase conjugator. The conjugator shows a steady phase-conjugate output with a high reflectivity (as high as approximately 68%), a fast rising time, and a large angular range of acceptance. It also shows a good fidelity in the phase-conjugate reconstructed image; the resolution reaches 17 microm.