Abstract: A laser-diode interferometer with a self-pumped (cat) phase- conjugate mirror is presented. The phase is shifted to produce a spatially uniform phase change uncancelled by a phase conjugator between the two beams of an interferometer. An ac interferometer would be realized by means of heterodyne techniques that can be employed by modulating the phase of the conjugate wave by using the wavelength-shifted laser diode (LD). Dynamic response of the phase-conjugate reflectivity of a BaTiO$-3$/ crystal is respond that is illuminated by a sinusoidal-modulated LD. The multigratings inside a cat mirror are taking into account. The time evolution can be solved by the coupled wave equation and the relaxation equation. The experimental results agree fairly well with numerical results. !23
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