Abstract
Photorefractive bridge phase conjugation is studied theoretically by two-region coupled-wave theory. The dependence of phase conjugate reflectivity and transmissivity on the input intensity ratio is measured. When two incoherent beams symmetrically enter opposite Tb:Cu:KNSBN crystal faces, the maximum reflectivities are higher than 351%, 236% and 147% for incident angles of 17.5°, 27.5 and 39° respectively; we also obtain a transmissivity higher than 58% for an incident angle of 33.5°. A comparison between the experimental data and theoretical results is also given.
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