Abstract

A phase-conjugate resonator is formed when the transmitted pump and diffracted beams from a photorefractive crystal are fedback from an active phase-conjugate mirror. Such a resonator may be used as an approach to sustain a dynamic hologram in the photorefractive materials.¹ We have investigated the oscillation conditions, the dynamic processes, and the competition phenomena in the high coupling and pump depletion regime. We assumed that the active phase conjugate mirror has instantaneous response and amplitude reflectivity of ρ. One of the beam is amplified by a factor of g via a two-wave mixer. In the steady state, analytical solutions are obtained for the intensities inside and outside the cavity. Threshold conditions are presented as functions of photorefractive coupling constant γl, phase conjugate reflectivity ρ, and amplification factor g. The transient process is studied by numerical techniques. Competition phenomena are investigated when more than one beam are oscillating in the resonator with different coupling constants. The potential impact on the hologram dynamic fixing is discussed.

© 1991 Optical Society of America