Earlier this year researchers developed sensing protocols that allow optical fibers to 'listen' outside an optical fiber where they cannot 'look', based on an interplay between light waves and ultrasound. Now they have constructed a measurement protocol that can map local power levels of multiple optical wave components over many kilometers of fiber. This new insight may be applied to sensor systems of longer reach, higher spatial resolution, and better precision.
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Wednesday, November 28, 2018
Researchers map light and sound wave interactions in optical fibers
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