OPTICAL FIBER AND FIBER-OPTIC CABLE FOR ITS MANUFACTURE Russian patent published in 2005 - IPC

FIELD: optical cable and optical fiber manufacture.

SUBSTANCE: branded optical fiber has optical-fiber core, marking layers, and dyed layer. Set of marking layers composed of small definite-size droplets of marking dye are disposed at intervals along optical fiber core, on its surface. Dyed layer is applied to marking layers and to optical-fiber core on areas covered with marking layers. Specified thickness of dyed layer is not less than or equal to 2 μm and not more than or equal to 10 μm. Specified thickness of marking layers is not less than or equal to 0.5 μm and not more than or equal to 2.5 μm. Specified length of marking layers is not less than or equal to 1 mm and not more than or equal to 15 mm. Interval between marking layers should be specified between 1 and 200 mm. Specified volumetric efficiency of marking layers should be mot over or equal to 20%. Specified diameter of small droplets should be not less than or equal to 10 μm. and not less than or equal to 10 μm. Optical cable has plurality of branded fibers disposed in forming tube covered with plastic jacket.

EFFECT: enhanced identifying ability and reduced laying loss.

18 cl, 11 dwg