What is the main purpose of the strength members in an optical fiber cable?

The primary function of the strength members in an optical fiber cable is to support tensile loads. These strength members are designed to withstand pulling forces that may occur during the installation and handling of the cable. When fiber optic cables are installed, they may be subjected to tension, especially during the pulling process to route the cables through conduits or across distances.

The strength members, which can be made from materials such as aramid fibers (like Kevlar) or steel, help ensure the optical fibers contained within the cable do not become damaged due to excessive tension. By providing this structural integrity, the strength members play a crucial role in maintaining the performance and longevity of the fiber optic system, safeguarding the delicate glass fibers from breakage or stress-induced attenuation.

While electrical insulation, flexing assistance, and protection from environmental factors are important characteristics of fiber optic cables, they do not pertain specifically to the role of strength members. Electrical insulation is usually provided by the cable’s outer jacket, while materials integrating flexibility or environmental protection are designed separately from the core strength members, emphasizing the unique focus of strength members in load-bearing capacities.