Multiplexed static and dynamic photorefraction at 780 nm in Bi12SiO20

The authors report preliminary results on the observation of multiplexed dynamic and static photorefractive behavior in the diffusion regime, at 780 nm in BSO. In the present case the dynamic gratings follow the expected response but the static gratings exhibit a lifetime which is nearly four orders of magnitude larger than the dynamic gratings at quite high erasing beam intensities. In addition both type of gratings exhibit comparable saturated diffraction efficiency values. Those effects may be attributed to strong participation of at least two distinct PR centers