What is the primary function of the outer jacket of a fiber optic cable?

The primary function of the outer jacket of a fiber optic cable is to protect the optical fibers. The jacket acts as a first line of defense against environmental factors like moisture, chemicals, and physical damage, which could compromise the integrity and performance of the delicate optical fibers inside. It ensures that the fibers remain intact and functional over time, especially in various installation environments that may expose the cable to hazards.

While flexibility and insulation are important properties of cables, they are secondary to the main purpose of safeguarding the fibers. Enhancing signal transmission relates more to the design and material of the optical fibers themselves and the overall cable structure rather than the outer jacket's function. Thus, the protective role of the outer jacket is critical for maintaining the reliability and longevity of fiber optic installations.