What prevents interference in optical fiber communication systems?

In optical fiber communication systems, the primary factor that prevents interference is their inherent resistance to electromagnetic interference. This is because optical fibers transmit data as light signals through a glass or plastic medium, which does not conduct electricity. As a result, optical fibers are immune to electromagnetic noise that can affect copper-based communication systems.

Electromagnetic interference (EMI) can be caused by various sources, including radio waves, electrical devices, and other nearby transmission lines. Since optical fibers do not utilize electrical signals for data transmission, they do not pick up this surrounding electromagnetic noise, ensuring a clearer signal and higher quality communication over long distances.

This characteristic allows optical fiber systems to maintain high signal integrity, making them particularly suitable for environments with considerable electromagnetic activity, such as industrial settings or when running parallel to heavy electrical equipment.