Fiber fuse effect as a mechanism of heat transfer

The fiber fuse effect generates high-temperature plasma in the core of optical fibers under high-power laser radiation when initiated by local fiber heating. This plasma absorbs incident laser radiation as heat in the fiber core, which then conducts in all directions, including radially outward. Blackbody radiation is also emitted from the high-temperature region and accounts for a non-negligible proportion of heat transfer to the outer layers of the fiber. An intentionally triggered fiber fuse can act as a mechanism of heat transfer to any material into which it is embedded. A numerical simulation of the fiber fuse is developed utilizing a finite difference discretization of the axisymmetric heat equation, and an internal reradiation model is implemented to capture the effects of blackbody emission from the high-temperature region. An investigation into the effects of fiber cladding diameter on embedded material interface temperatures is conducted. Additionally, comparisons are made between results generated with and without the radiation model activated to demonstrate the importance of capturing this physics in simulating the fiber fuse effect.