Optical activity measurements in the photorefractive Bi12TiO20 single crystal fibers

In the present work the specific optical activity coefficient of the photorefractive Bi12TiO20 single crystal fibers have been determined. The samples were illuminated by lambda = 0.6328 mu m and lambda = 0.5145 mu m. The proposed experimental technique is simple, fast and accurate. It is based on the automatic electronic phase shift detection in a dynamic polarimetric system. 6.62 +/- 0.06 deg/mm was obtained for lambda = 0.633 mu m and 10.0 +/- 0.2 deg/mm for lambda = 0.514 mu m. (C) 1998 Elsevier Science B.V. All rights reserved.