Definitions for "Microbending"
Bends in the fibre, usually of a radius less than 1mm, that cause a localized increase in the loss of the fibre due to the "leaking" of light through the core-cladding interface.
Curvatures of the fiber which involve axial displacements of a few micrometers and spatial wavelengths of a few millimeters. Microbends cause loss of light and consequently increase the attenuation of the fiber.
Minute but severe bends in fiber that result in light displacement and increased loss. Most microbending can be avoided by selection of buffer materials and proper cabling, handling and installation techniques.