FIBRE OPTIC TUNNELING Russian patent published in 2023 - IPC G02B6/44 

FIELD: fibre optic technology.

SUBSTANCE: invention relates namely to pass-through devices for hermetically sealed input of optical fibres through a partition, and can be used to introduce optical fibres between areas with different pressures. A fibre-optic penetration containing a housing with optical fibres passing through it from the high pressure side to the low pressure side; hermetic blocks are introduced into the housing, which form cavities, at least two of which are filled with an epoxy sealing compound, while the hermetic blocks are made individually for each optical fibre through holes filled with a sealing compound. At least one body cavity between the hermetic blocks is filled with viscous liquid material. The inner surface of the housing in the specified housing cavity is equipped with transverse annular grooves. Each hole in the hermetic blocks delimiting the specified body cavity has a dumbbell shape.

EFFECT: increase in the operational reliability of tunnelling under conditions of explosive experiments in underground protective structures while increasing its service life.

1 cl, 2 dwg