Spatial-frequency characteristics of the reflectivity and transmissivity of a BaTiO3 phase conjugator (PC) combined with extraordinary rays are investigated and numerical results obtained. It is shown that the reflection of a BaTiO3 PC represents a high-pass or a bandpass filter, whereas its transmission represents a low-pass or a bandpass filter. In addition, the filtering characteristics of this PC can be chosen by using appropriate values of such parameters as the average incident-beam angle from the c axis, the pump-beam intensity ratio, and the applied external electric field. A BaTiO3 PC exhibits characteristics that are quite different from those of a Bi12SiO20 PC, since the latter obtains only a high- or low-spatial-frequency filter.
© 1987 Optical Society of America
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