Abstract
A versatile shear interferometer is developed by using degenerate four-wave mixing in photorefractive crystal (PRC) BaTiO3. A major advantage of this system is its ability to shear a wave front by a small amount (10μm) in any direction. In addition, the system can exhibit both lateral and radial shearing without any change in the experimental setup.
© 1990 Optical Society of America
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