TWISTED MULTI-CORE OPTICAL CABLE WITHOUT A BINDING THREAD LAYER AND METHOD FOR MANUFACTURE THEREOF Russian patent published in 2022 - IPC G02B6/44 

FIELD: communication.

SUBSTANCE: invention relates to the field of technology for optical communication transmission, in particular, to a twisted multi-core optical cable without a binding thread layer and to a method for manufacture thereof. Claimed is a twisted multi-core optical cable without a binding thread layer and a method for manufacture thereof. Optical cable comprises a central reinforcing element (1), at least one first water-blocking thread (2), a cable core (3), a water-blocking element (7) and an external shell (8); wherein the first water-blocking thread (2) is wrapped around the external surface of the central reinforcing element (1); the cable core (3) is located on the external surface of the central reinforcing element (1), the cable core (3) comprises m tubes (4) with free fibre layout and n filling wires (5) twisted by the SZ type; wherein m is greater than or equal to 1, n is greater than or equal to 0, the tubes (4) with free fibre layout comprise 1 to 48 optical fibres (6); the external shell (8) is located on the outside of the cable core (3); and the water-blocking element (7) is located between the cable core (3) and the external shell (8). A marking line (9) for opening the cable extending in the axial direction along the external shell (8) is therein made in a convex way on the external surface of the external shell (8).

EFFECT: creation of a twisted multi-core optical cable without a binding thread layer for preventing the expansion of tubes with free fibre layout and changing the outer diameter of the optical cable when the tension of the binding thread is too low, and prevention of flattening of the tubes with free fibre layout when the tension of the binding thread is too high, thereby causing overattenuation during transmission via optical fibre.

11 cl, 7 dwg