The Collaborative International Dictionary
optical fiber \optical fiber\ n. (Communications) A thin fiber of very pure glass used to carry signals transmitted by means of light. It has much greater information-carrying capacity than a copper wire, and in the 1990's became a dominant means of transmitting telephone communications over long distances.
Wiktionary
n. (alternative form of optical fibre English)
WordNet
n. a very thin fiber made of glass that functions as a waveguide for light; used in bundles to transmit images [syn: glass fiber, optical fibre, glass fibre]
Wikipedia
An optical fiber ( or optical fibre) is a flexible, transparent fiber made by drawing glass ( silica) or plastic to a diameter slightly thicker than that of a human hair. Optical fibers are used most often as a means to transmit light between the two ends of the fiber and find wide usage in fiber-optic communications, where they permit transmission over longer distances and at higher bandwidths (data rates) than wire cables. Fibers are used instead of metal wires because signals travel along them with lesser amounts of loss; in addition, fibers are also immune to electromagnetic interference, a problem from which metal wires suffer excessively. Fibers are also used for illumination, and are wrapped in bundles so that they may be used to carry images, thus allowing viewing in confined spaces, as in the case of a fiberscope. Specially designed fibers are also used for a variety of other applications, some of them being fiber optic sensors and fiber lasers.
Optical fibers typically include a transparent core surrounded by a transparent cladding material with a lower index of refraction. Light is kept in the core by the phenomenon of total internal reflection which causes the fiber to act as a waveguide. Fibers that support many propagation paths or transverse modes are called multi-mode fibers (MMF), while those that support a single mode are called single-mode fibers (SMF). Multi-mode fibers generally have a wider core diameter and are used for short-distance communication links and for applications where high power must be transmitted. Single-mode fibers are used for most communication links longer than .
An important aspect of a fiber optic communication is that of extension of the fiber optic cables such that the losses brought about by joining two different cables is kept to a minimum. Joining lengths of optical fiber often proves to be more complex than joining electrical wire or cable and involves careful cleaving of the fibers, perfect alignment of the fiber cores, and the splicing of these aligned fiber cores. For applications that demand a permanent connection a mechanical splice which holds the ends of the fibers together mechanically could be used or a fusion splice that uses heat to fuse the ends of the fibers together could be used. Temporary or semi-permanent connections are made by means of specialized optical fiber connectors.
The field of applied science and engineering concerned with the design and application of optical fibers is known as fiber optics.
Usage examples of "optical fiber".
There is a type of cable, used up until the advent of optical fiber, called 21-quad, which consists of 21 four-bundle pairs of cable and a coaxial line.
Some bypass communications, but we're running out of optical fiber.
He still has over two hundred kilometers of optical fiber on him and he has a range of over a hundred.
And that's when I saw the shiny-new datajack and the optical fiber trailing down to the simsense-chip player on her belt.
The floor has been leveled by pouring in concrete, and conduits rise from it every few meters with orange cables dangling from their open tops: optical fiber lines.
They cut an older cable--first-generation optical fiber--joining Korea to Nippon.
The buried steel tube emerged, trailing a short length of blood-slick optical fiber.
Their high-rate connection was optical fiber strung across the ocean ice.