Continuous-wave Z-scan measurement of photorefractive SBN : 60

A cw-probe Z-scan technique was employed to measure the photoinduced index change in a photorefractive SBN:60 crystal. For this experiment a three-det ector data-acquisition system was used to account for temporal changes in t he laser. The effects of various beam parameters such. as intensity, polari zation, and wavelength were studied. A theoretical simulation of the Z scan based on a band-transport model of photorefractive-index variation was als o developed. This model provides reasonable agreement with the experimental results. (C) 2000 Optical Society of America. OCIS codes: 160.5320, 160.43 30, 190.4400, 190.5330, 190.7070.