Main aerial optical cables

The main aerial optical cables include ADSS, Figure 8, OPGW, and catenary cables, designed for overhead installation to provide high-speed, long-distance optical communication.

Overview

Aerial fiber optic cables are specialized outdoor cables suspended between utility poles, towers, or other supporting structures. They are widely used in telecommunications, rural broadband, smart power grids, and long-haul backbone networks due to their lower cost, faster deployment, and flexibility compared to underground cables. These cables must withstand environmental stresses such as wind, ice, UV radiation, extreme temperatures, and mechanical tension while maintaining stable optical signal transmission.

Main Types of Aerial Optical CablesADSS (All-Dielectric Self-Supporting Cable)Fully self-supporting without the need for a metallic messenger wire. Can span up to 1000 meters between poles. Fibers are loosely distributed in the core to prevent signal attenuation from cable deformation.

Commonly used along power transmission lines. Figure 8 CableNamed for its external strength member forming a figure-8 shape. Can be made with steel or insulating materials.

Self-supporting and suitable for long spans, often used in power and telecom networks.

OPG

W (Optical Ground Wire)Combines optical fibers with a grounding function for power lines. Provides both communication and lightning protection. Typically installed on high-voltage transmission lines.

Catenary (or Lashed) CableOutdoor loose-tube cable lashed to a pre-existing support line or messenger wire. Requires an existing support structure and is ideal for shorter spans or areas with pre-installed infrastructure.

Installation Considerations

Support Structures: Poles or towers must be surveyed for spacing, height, and load capacity. Methods: Stationary reel method: Used when obstacles exist along the route. Moving reel method: Efficient for unobstructed routes, allowing continuous cable deployment.

Environmental Protection: Cables are designed to resist moisture, heat, mechanical stress, and potential vandalism or animal damage. ApplicationsLong-distance and metropolitan telecom networks. Rural broadband and FTTx access.

Smart power grid communication. Cross-river or cross-road connections where underground installation is impractical. Aerial optical cables remain critical for high-speed, reliable communication in areas where underground cabling is difficult or costly, offering a balance of performance, durability, and installation efficiency.