fiber cable is a cable containing one or more optical fibers. The optical
fiber elements are typically individually coated with plastic layers and
contained in a protective tube suitable for the environment where the cable
will be deployed.
A fiber optic
cable consists of a bundle of glass threads, each of which is capable of
transmitting messages modulated onto light waves. There are three types of
fiber optic cable commonly used: single mode, multimode and plastic optical
cable functions as a "light guide," guiding the light introduced at one end
of the cable through to the other end. The light source can either be a
light-emitting diode (LED) or a laser.
fiber is manufactured from silicon dioxide by either of two methods. The
first, the crucible method, in which powdered silica is melted, produces
fatter, multimode fibers suitable for short-distance transmission of many
light wave signals. The second, the vapor deposition process, creates a
solid cylinder of core and cladding material that is then heated and drawn
into a thinner, single-mode fiber for long-distance communication.
fibres in a cable are normally protected in one of two ways, either being
tight buffered or contained in loose tubes. When tight buffered the
individual optical fibre is covered directly with a layer of thermoplastic
material or one or more fibres can be contained within a loose tube which is
filled with a thixotropic gel. These processes are performed on specially
equipped extrusion lines.
variety of industries including the medical, military, telecommunication,
industrial, data storage, networking, and broadcast industries are able to
apply and use fiber optic technology in a variety of applications.
cables are not sensitive to electromagnetic fields or atmospheric conditions
that can degrade signaling in wireless and copper. This advantage prevents
data loss and data from being obtained from the fiber itself.
telephone companies use optical fiber throughout their system as the
backbone architecture and as the long-distance connection between city phone
companies are an emerging group that have begun to utilize fiber-optics in
their communication systems. Most power utilities already have fiber-optic
communication systems in use for monitoring their power grid systems.
become the world's fourth largest market for optic-fibre cable after Japan,
the US, and China.
The demand for optical fiber cable has increased dramatically over the last
two years. While demand began decreasing in North America and Europe in late
2000, India was experiencing a boom.
shortage of optical fiber is slowing the construction of new
telecommunications networks and forcing even big buyers to renegotiate
supply agreements. Meanwhile, the shortfall is proving a bonanza for the
small fraternity of fiber manufacturers as prices that fell for years have
stabilized and in some cases even increased.
companies around the world manufacture optical fibers. The large
telecommunications fiber manufacturers are United States, Asia and the
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