Light scattering characteristics of hole formed by fibre fuse

The characteristics of the scattering that occurs in the middle of an optical fibre when a bubble train forms as a result of the fibre fuse that is induced when a high power signal is launched into the fibre is investigated for the first time. It was found that the maximum scattering angle of the light, which is scattered at the top of the bubble train, is around 160°, regardless of the presence of a UV coating or the fibre fuse formation power. It was clear that the maximum scattered power from an optical fibre with a UV coating could be dealt with as a class 1M product when the incident light power launched into the optical fibre was several watts.