optical fibre

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optical fibre

(fibre optics, FO, US "fiber", light pipe) A plastic or glass (silicon dioxide) fibre no thicker than a human hair used to transmit information using infra-red or even visible light as the carrier (usually a laser). The light beam is an electromagnetic signal with a frequency in the range of 10^14 to 10^15 Hertz.

Optical fibre is less susceptible to external noise than other transmission media, and is cheaper to make than copper wire, but it is much more difficult to connect. Optical fibres are difficult to tamper with (to monitor or inject data in the middle of a connection), making them appropriate for secure communications. The light beams do not escape from the medium because the material used provides total internal reflection.

AT&T Bell Laboratories in the United States managed to send information at a rate of 420 megabits per second, over 161.5 km through an optical fibre cable. In Japan, 445.8 megabits per second was achieved over a shorter distance. At this rate, the entire text of the Encyclopedia Britannica could be transmitted in one second. Currently, AT&T is working on a world network to support high volume data transmission, international computer networking, electronic mail and voice communications (a single fibre can transmit 200 million telephone conversations simultaneously).

See also FDDI, Optical Carrier n, SONET.
References in periodicals archive ?
Bringing together more than 25 research organisations and industry partners, the AirGuide Photonics programme hopes to develop 'the next generation of optical fibres' and realise their enormous potential across a multitude of uses--ranging from a more responsive internet, through space exploration, to laser-based manufacturing and bioengineering.
By adding OpTek to the STH family, the company is able to further its position in optical fibre solutions.
In response, network operators are implementing optical fibre networks that terminate closer to their subscribers--at the home, business, antenna or street cabinet.
"The margins will strengthen further in the near future, as Company has taken steps to mitigate the risk from high raw material prices, by making operational its additional optical fibre capacity in its Bhiwadi plant facility.
Zmojda, "Fluorescent polymeric optical fibre illuminator," IEEE Electronics Letters, vol.
PolyOne has developed a full range of ECCOH LSFOH solutions developed specifically for optical fibre cable.
To date, Optical Fibre Flag Labels have been tested against High and Low Temperatures, Moisture Resistance, H2S Sour Gas and Salt Mist Spray Exposure and 1000 hours accelerated UV.
Aksh Optifibre currently has 2 state of the art manufacturing units; One in Bhiwadi, Rajasthan which primarily caters to the manufacturing of World Class Optical Fibre & Optical Fibre Cables and another unit in Reengus, District Sikar, Rajasthan which specializes in the manufacturing of FRP Rods and Optical Fibre Cables.
The new optical fibre network will connect 17 unserved cities and towns..
FBPI broadband optical fibre is designed for high performance spectroscopy applications, including optical fibre testing, environmental monitoring, gas phase measurements, and lasers.
Ltd, has started the production of optical fibre at its new plant situated in Haimen, Jiangsu Province, China.
Vallance, "Whispering gallery modes in standard optical fibres for fibre profiling measurements and sensing of unlabelled chemical species," Sensors, vol.

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