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- W1659365429 abstract "In recent work at Northwestern University, Multiplexed Two‐Wave Mixing Interferometers (MTWM) have been developed. These systems are able to perform optical detection of ultrasonic motion over an array of points simultaneously. Optical phase gratings are used to create a detection‐array of laser beams that are directed to the specimen. The detection array can be arranged in several ways on the test object. The scattered beams from the detection‐array are collected and combined with a single reference beam in a photorefractive crystal to form a multiplexed two‐wave mixing configuration. Each of the output beams from the photorefractive crystal is imaged on to a separate element of a photodetector array. The resulting MTWM system is capable of providing simultaneous optical detection (with high spatial resolution and sub‐nanometer displacement sensitivities) at several points on a test object. The MTWM system can be used in several modes for laser ultrasonic NDE of flaws and materials characterization. In t..." @default.
- W1659365429 created "2016-06-24" @default.
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- W1659365429 date "2003-01-01" @default.
- W1659365429 modified "2023-10-14" @default.
- W1659365429 title "Lamb Wave Dispersion Characterization Using Multiplexed Two-Wave Mixing Interferometry" @default.
- W1659365429 cites W1674579750 @default.
- W1659365429 doi "https://doi.org/10.1063/1.1570155" @default.
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