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Understanding multimode fibers
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An optic fiber can be broadly defined as a thin glass fiber carrying
light signals along its length. These fibers have a glass core covered
by ‘cladding’, which traps the light in the core. Together they have a
diameter of 125µm. The size of the core differs based on the number of
rays of light they can carry and based on this, fibers are classified
as singlemode or multimode fibers. Singlemode fibers carry a single ray
of light and have a 9µm core while multimode fibers carry multiple rays
of light and have a 50-62.5µm core. Multimode fibers (MMFs) are
generally used for short distance transmissions.
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Understanding Singlemode fibers
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Optical fibers are thin and flexible transparent glass pipes that carry
light. They are used in fiber optic communication as they are superior
to metal fibers because of their lower rate of data loss and immunity
to magnetic disturbance. Two types of optic fibers, singlemode and
multimode fibers, are used in fiber optic communication. Singlemode
fibers (SMF) or monomode fibers can carry only a single ray of light,
while multimode fibers can carry more than one light ray at a time.
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Understanding Simplex and Duplex fibers
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Networks, channels or interfaces using optic fibers can be classified into Duplex, Simplex or multiple, based on the mode of operation. As the name implies, Simplex refers to a single fiber, Duplex to two fibers and multiple to multiple fibers, but there’s a lot more to Simplex and Duplex fibers.
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