However, the cost of FSO systems that are targeted
for short-range operations are fairly low. Such systems are built out of low-cost
optical components and simple mechanical systems. Another significant cost savings,
both upfront and recurring, also comes from the fact that FSO systems do not
require any spectral licensing fees.
Based on the preceding points, it should be clear how using FSO technology helps
wireless mesh networks overcome some of their limitations, making FSO ideally suited
for wireless mesh networks. This complement does not flow in only one direction, however.
Mesh networks also enable FSO to overcome some of its key limitations.
?– Distance FSO technology performs with exceptional reliability when used over
comparatively short distances, something in the order of tens of meters to a few
hundred meters. However, when used over longer distances, it becomes less reliable
during atmospheric events such as fog and heavy rain. Therefore, in order to
achieve fiber-like reliability, it is necessary for the lengths of FSO links to be fairly
short. The multihop capability of a mesh network allows the lengths of FSO links
to be maintained at less than a few hundred meters.
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