Visualization of the photorefractive grating in BSO |
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| Authors: | S C Som S K Ghorai A Satpathi |
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| Institution: | (1) Department of Applied Physics, Calcutta University, 92 Acharya Prafullachandra Road, 700009 Calcutta, India;(2) Present address: Department of Electronics and Communication Engineering, Birla Institute of Technology, Mesra, 835215 Ranchi, India |
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| Abstract: | A technique based on self-imaging at finite conjugates has been experimentally demonstrated for visualization of laser-induced photorefractive gratings in BSO. A simple model theory has been used to provide the correct rules of geometrical optics of self-imaging. A novel technique has been used for photoinducing the periodic structure. An application has been made to determine the harmonic components of the nonsinusoidal refractive index modulation in the BSO for a grating period of 10  m and for external DC voltages of 6.0 and 3.0 kV. The technique is directly applicable to the visualization and study of laser-induced gratings (LIG) in thin nonlinear optical media. |
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