What is the primary benefit of using single-mode fiber compared to multimode fiber?

The primary benefit of using single-mode fiber over multimode fiber is its ability to support higher bandwidth over long distances. Single-mode fiber has a smaller core diameter, allowing only one mode of light to propagate through the fiber, which minimizes modal dispersion. This characteristic enables single-mode fibers to transmit data at significantly higher data rates and over much greater distances without the loss of signal quality that can occur in multimode fibers.

As the signal travels through single-mode fiber, it remains coherent and maintains its integrity, making it particularly advantageous for telecommunications and broadband applications where long-distance transmission and high bandwidth are essential. This is why single-mode fiber is often chosen for backbone installations in networks where high capacity and distance are critical requirements.