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SingleMode/MultiMode Fiber
Fiber-optics are made in one of two
forms: SingleMode and MultiMode. MultiMode fiber has a larger core,
and allows hundreds of rays of light to pass through the fiber at the
same time. SingleMode fiber is much smaller and only allows one ray
of light to pass through. SingleMode fiber maintains integrity over
longer distances. MultiMode fibers used when distance requirements are
2 km or less. Fiber-Optic cable comes in different diameters. SingleMode
is typically 8-10 um with the outside jacket measuring 125 um. Contrast
this to Multimode, which while retaining the 125um outer diameter typically
has either a 50um or a 62.5um core. The actual fiber can be made of
glass or in some cases, less expensive plastic. Some MultiMode fiber
creators are offering a core of 125um!
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CertiGuide to A+ (A+ 4 Real) (http://www.CertiGuide.com/apfr/) on CertiGuide.com
Version 1.0 - Version Date: March 29, 2005
Adapted with permission from a work created by Tcat Houser et al.
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