What is the primary cause of microbending in fiber optic cables?

Microbending in fiber optic cables primarily occurs due to tight bends or pressure points along the fiber. This phenomenon happens when the fiber is subjected to small deformations or disturbances, often caused by physical pressures or sharp bends that can arise from installation practices or environmental factors. These microbends can lead to increased attenuation, resulting in signal loss or degradation of performance.

When fibers are improperly bent, the light propagating within can escape from the core, significantly impacting signal integrity. Therefore, ensuring that the fiber is installed with smooth curves and avoiding tight bends is crucial in maintaining optimal performance and minimizing losses. Understanding this principle is essential for anyone involved in fiber optic installations, as it directly influences the overall reliability of the communication system.