Optical delay in photorefractive SBN:61 and SBN:61:Ce via two-wave mixing : A theoretical study

The slowing down of light in photorefractive SBN:61 and SBN:61:CeO₂ as a function of input pulse width via two wave mixing is presented theoretically. Optical delay has been found to vary from 0.106 s to 4.411 s in SBN: 61 and from 0.212 s to 6.852 s in SBN:61:CeO₂ on varying the pulse width from 0.25 s to 7 s respectively. Cerium doping resulted in enhancement of optical delay at low pulse width. At higher pulse width optical delay was stabilized.