Broadband optical detection of ultrasound by two-wave mixing in a photorefractive crystal
- 16 December 1991
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 59 (25) , 3233-3235
- https://doi.org/10.1063/1.105742
Abstract
A method which allows broadband (from typically 1 KHz) optical detection of ultrasound with large light gathering from a scattering surface is presented. The wave scattered by the surface is mixed inside a BaTiO3 photorefractive crystal with a pump wave directly derived from the laser to provide a sideband-free reference wave. A polarization configuration which provides sensitive and linear ultrasonic displacement detection is described. This method is demonstrated by detecting laser generated ultrasound.Keywords
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