Propagation of Fiber Fuse in Optical Fibers

摘要

The unsteady-state thermal conduction process in single-mode (SM) optical fiber was studied theoretically with the explicit finite-difference method. In order to deal with the thermal behavior of the silica glass near the phase transition (melting and vaporization) points, we parameterized the specific heat in the calculation. The core-center temperature increased suddenly when an optical power of 1W was input into the core layer heated at 1373K. This rapid heating of the core initiated the 'fiber fuse' phenomenon. The calculated propagation rates of the fiber fuse were in fair agreement with the experimentally determined values.