High-speed photography, spectra, and temperature of optical discharge in silica-based fibers

Fiber Fuse Propagation Behavior

“…(4). The temperature is estimated to be more than a few thousand degrees Kelvin by Hand & St. J. Russell (1988) and Dianov, Fortov, Bufetov, Efremov, Rakitin, Melkumov, Kulish & Frolov (2006). The propagation speed and pump power dependence of a fiber fuse have been investigated by many researchers.…”

Thermal Effects in Optical Fibres

“…The first numerical simulation of the fuse propagation used an explicit finite-difference method where it was assumed that the electrical conductivity and consequently the absorption of the core increase rapidly above a given temperature, Tc. Using this thermally induced optical absorption, Tc of 1100 ºC and an optical power of 1 W, the core temperature was shown to reach 100000 ºC (Shuto et al, 2003), which is well above the temperature of the fuse zone measured by (Dianov et al, 2006). Also, the trigger to ignite this effect was studied.…”

“…After the fuse zone propagation, the fibre core shows a string of voids, being permanently damaged. The phenomenon was always associated with a thermal effect and although there are not yet very accurate experimental data for the actual temperature achieved in the fibre core, it is believe that the peak temperature is up above the silica vaporization point, around 3300 K. Some authors also refer that the white light emission characteristic of this effect may indicate temperatures that would allow plasma like fuse zone (10 4 ) (Hand et al, 1988 b; Dianov et al, 2006;Shuto, 2010). The first explanation for the effect related it to a thermal self-focusing mechanism (Kashyap et al, 1988).…”

Simulation of Fiber Fuse Phenomenon in Single-Mode Optical Fibers

“…On the other hand, Hand and Russell measured the fiber fuse temperature to be 5,400 K [5], and Dianov et al obtained a temperature of 4,700-10,500 K [28], [90] by measurement. They estimated the temperatures from precisely measured spectral data in the 600-1,400 nm [5] and 500-800 nm [28], [90] regions, while assuming blackbody radiation.…”

“…They estimated the temperatures from precisely measured spectral data in the 600-1,400 nm [5] and 500-800 nm [28], [90] regions, while assuming blackbody radiation.…”