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Alluxa - Optical Coatings LB 8/23
Photonics Dictionary

microbending

In optical fiber, sharp but microscopic curvatures that create local axial displacements of a few microns and spatial wavelength displacements of a few millimeters. One frequent cause is longitudinal shrinking of the fiber buffer. But it also can result from poor drawing or cable manufacturing methods, installation, etc. See microbending loss.
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