A fully dry multi-core optical unit and optical cable

Abstract

The invention discloses an all-dry multi-core optical unit and an optical cable. The optical unit includes an outer wall, a multi-core optical fiber, and an inner layer resin filled between the multi-core optical fiber and the outer wall; the resin modulus of the outer wall ranges from 1000 MPa to 1200 MPa; the inner layer resin, its modulus The ratio of the amount to the outer wall modulus is between 1:10 and 24. The optical cable includes one or more of the all-dry multi-core optical units and an outer sheath, and the optical fiber density is 8.39 cores / mm²~9.78 cores / mm². The invention fills the low-modulus resin between the multi-core optical fiber and the outer wall of the optical unit, optimizes the stress distribution, balances the micro-bending loss and the macro-bending loss through the coordination of the modulus of the outer wall and the inner layer resin, and can greatly reduce the damage caused by the all-dry type. The stress-sensitive defect caused by the lack of ointment buffer in the fiber optic cable. In the all-dry multi-core optical cable provided by the present invention, since the stress distribution of the optical fiber in the optical unit under the bending state is optimized, the optical fiber density is effectively improved.

Description

technical field [0001] The invention belongs to the field of optical communication, and more particularly, relates to an all-dry multi-core optical unit and an optical cable. Background technique [0002] Optical cables can be divided into filled optical cables, semi-dry optical cables and fully dry optical cables according to different water blocking methods. Among them, filled and semi-dry optical cables are mainly filled with ointment in the optical fiber loose tube to achieve water blocking. However, the ointment is often difficult to clean during the construction process, and it will pollute the environment and bring certain inconvenience to the construction of the optical cable. Since there is no ointment filling in the production process, the fully dry optical cable not only solves many troubles in the construction process, but also conforms to the concept of green environmental protection. However, the ointment in the optical cable not only plays the role of waterpr...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a fully dry multi-core optical unit and optical cable, the purpose of which is to prevent macrobending and Micro-bending limits the range of movement of the optical fiber to a certain extent, thereby uniform stress distribution, reducing bending loss, and reducing total attenuation, thereby solving the problem of existing dry-type optical cables, which suffer from large bending loss and attenuation due to the lack of high buffering Technical issues with poor performance

Images