KOPPLINGSDON INNEFATTANDE OPTISKA FIBRER

摘要

A coupling device is disclosed for coupling energy from a first line to a second line. The device includes a first optical fibre (57) which is connected in series with the first line and a second optical fibre (59) which is in contact with the first fibre along a certain length and is connected to the second line. Each of the fibres has a core the refractive index for light and fusing point of which exceed the refractive index for light and fusing point respectively of a covering of the fibre. The fibres may be twisted, and contact between them established by heating to melt the covering.