Yn. Novosad et Sg. Odulov, PHOTOREFRACTIVE OSCILLATIONS ON BI12TIO20 CRYSTALS WITH A REAR FACE AS A REFLECTOR, UKRAINSKII FIZICHESKII ZHURNAL, 38(9), 1993, pp. 1307-1311
Self-excitation of coherent oscillation in external square-shape elect
ric field by the only incident wave is reported. Oscillation takes pla
ce in a ring-loop arrangement and in a linear ( or semilinear ) cavity
with reflection from the rear face of the sample.