LANs (local area networks) use fiber optics primarily in the backbone but increasingly to the desk. The LAN backbone often needs longer distance than copper cable (Cat 5/5e/6) can provide and of course, the fiber offers higher bandwidth for future expansion. Most large corporate LANs use fiber backbones with copper wire to the desktop.
What is a LAN ?
It can be seen that almost all the infrastructures use optical media. Indeed, LAN architectures require Segment that supports high bit rates as soon as the number of stations is high. Moreover, the limitation of links to a maximum length of 90 m in copper is practically inapplicable for large buildings or campuses. As for the electromagnetic immunity problems, they are only an additional factor of choice of the optical fiber. Fiber optics has established itself as "the" inescapable support on the federating segments of Networks today. It is not present on all installations carried out in recent years, but 96% of the new installations now use optics for this backbone segment.
The European market has therefore opened up to optics. Even if the whole optical (fiber to the workstation) has not yet imposed on the last 90 meters, the fiber optic is present and nothing seems to be able to dislodge it from the federating segments. Flows continue to grow, prices
Optical systems and optoelectronic components are steadily decreasing as the limits of the copper support seem to be reached.
Aside from the SOHO case, fiber optic is today the mainstay of our LAN networks.