Micro-bending loss

Optical fiber shaft produces μm-level bending (microbending) caused by additional loss, the main reasons are: fiber cable, the support surface of the tiny irregularities caused by the uneven stress in various parts of the random microbending; core and cladding interface is not smooth microbending; cable laying, the tension in various parts of the uneven microbending; fiber by the uneven side pressure and the formation of microbending; fiber encountered temperature changes, the formation of microbending. Due to thermal expansion and contraction of the formation of micro-bending.