The signal-to-noise ratio of the output of an adaptive holographic interferometer (AHI) based on a Bi<sub>12</sub>TiO<sub>20</sub> crystal is investigated. We show experimentally that the sensitivity of an AHI using the non-Bragg orders of diffraction in a thin photorefractive material is more than an order of magnitude greater than that of an AHI employing two-wave mixing in photorefractive volume holograms.
© 1997 Optical Society of America
V. Petrov, C. Denz, J. Petter, and T. Tschudi, "Enhancing the sensitivity of an adaptive holographic interferometer using non-Bragg diffraction orders," Opt. Lett. 22, 1902-1904 (1997)