Abstract

1 Introduction Recently, applications of phase-conjugation[1][23][4 in photorefractive crystals to interfer-ometrv have found considerable attention. In our experiments a stable self-referencing interferometer using the phase-conjugation was built with a BTO crystal in a four-wave mixing geometry. The second pump wave which works as reconstruction wave of the interferometer has been realized by a self-pumped phase-ronjugation process in BaTiO 3 crystal. The advantages of such arrangements are *distortion-free reconstruction wave aself-alignment of the reconstruction wave * real-time process * interferometric measurements of dynamic changes of the incident wave front In the following the realization of a real-time double-exposure interferometer based on a BTO crystal for storing the holograms and using a BaTiO 3 crystal to create the reconstruction wave is discussed.

© 1993 Optical Society of America