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Keywords = Mach-Zehnder interferometers
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12 pages, 389 KB  
Article
Smart Laser Interferometer with Electrically Tunable Lenses for Flow Velocity Measurements through Disturbing Interfaces
by Jürgen W. Czarske, Hannes Radner, Christoph Leithold and Lars Büttner
Photonics 2015, 2(1), 1-12; https://doi.org/10.3390/photonics2010001 - 5 Jan 2015
Cited by 4 | Viewed by 6439
Abstract
Interferometric velocity measurements are of great importance at flow investigations. However, the laser beams can be distorted at the interfaces between optical media of different refractive indices. Temporal fluctuations of these distortions will cause a deterioration of the laser interferometer signals. We have [...] Read more.
Interferometric velocity measurements are of great importance at flow investigations. However, the laser beams can be distorted at the interfaces between optical media of different refractive indices. Temporal fluctuations of these distortions will cause a deterioration of the laser interferometer signals. We have harnessed the power of programmable photonics devices to eliminate this signal deterioration. Non-invasive flow velocity measurements through a rapidly fluctuating media interface with large strokes of about 100 microns are presented. Our work represents a paradigm shift for interferometric velocity measurement techniques from using static to dynamic optical elements. Full article
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