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Simulation of fiber fuse phenomenon in single-mode optical fibers

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5 Author(s)
Shuto, Y. ; Photonics Labs., NTT Corp., Atsugi, Japan ; Yanagi, S. ; Asakawa, S. ; Kobayashi, M.
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The unsteady-state thermal conduction process in single-mode (SM) optical fiber was studied theoretically with the explicit finite-difference method (FDM). In the numerical calculation it was assumed that the electrical conductivity of the core layer increased rapidly above 1323 K. The core-center temperature changed suddenly and reached over 3×105 K when an optical power of 1 W was input into the core layer heated at 1373 K. This rapid heating of the core initiated the "fiber fuse" phenomenon. The high-temperature core areas, whose radiation spectrum extended over a wide range from the infrared to the ultraviolet regions, were enlarged and propagated toward the light source at a rate of about 0.7 m s-1. This rate was in fair agreement with the experimentally determined value.

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Lightwave Technology, Journal of  (Volume:21 ,  Issue: 11 )