We present experimental results describing the influence of optical bias on the transient characteristics of gratings formed in photorefractive BSO. A transient peak is evident, and the properties of this peak can be controlled by suitable adjustment of the relative intensities of the optical beams involved.
Soutar, C., Gillespie, W. A., & Cartwright, C. M. (1992). The effect of optical bias on grating formation dynamics in photorefractive BSO. Optics Communications, 90(4-6), 329-334. https://doi.org/doi:10.1016/0030-4018(92)90286-Z