We investigate in detail the heating and burning characteristics in various commercially available optical fibers when a bubble train forms in the middle of the fiber as a result of the fiber fuse that occurs when a high power signal is launched into the fibers. We found that the scattered light heats UV coated fiber to around 100 °C, and nylon jacketed silica fiber and fire-retardant jacketed fibers (PVC or FRPE jacketed fiber) to over 200 °C, and finally the fiber burns and is destroyed at a launched optical power of 3 W. Furthermore, we confirm that the combustion does not spread when we use fire retardant jacketed fibers.
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