Gloria Smith - Task 1 - Physics by Gloria Smith - Contrast in Design https://padlet.com/gloria_smith/tnin7lzyngsk Made with the help of a typing monkey en-us 2017-03-12 22:47:04 UTC 2026-03-24 14:11:25 UTC hello@padlet.com (EDIT) gloria_smith https://padlet.com/gloria_smith/tnin7lzyngsk/wish/159539916 Optical fiber (or "fiber optic") refers to the medium and the technology associated with the transmission of information as light pulses along a glass or plastic strand or fiber. Optical fiber carries much more information than conventional copper wire and is in general not subject to electromagnetic interference and the need to re-transmit signals. Most telephone company long-distance lines are now made of optical fiber. ]]> 2017-03-12 23:07:13 UTC https://padlet.com/gloria_smith/tnin7lzyngsk/wish/159539916 (EDIT) gloria_smith https://padlet.com/gloria_smith/tnin7lzyngsk/wish/159540715 An optical fiber is a single, hair-fine filament drawn from molten silica glass. These fibers are replacing metal wire as the transmission medium in high-speed, high-capacity communications systems that convert information into light, which is then transmitted via fiber optic cable. Currently, American telephone companies represent the largest users of fiber optic cables, but the technology is also used for power lines, local access computer networks, and video transmission.]]> 2017-03-12 23:17:00 UTC https://padlet.com/gloria_smith/tnin7lzyngsk/wish/159540715 (EDIT) gloria_smith https://padlet.com/gloria_smith/tnin7lzyngsk/wish/159540908 Optical fibers are composed primarily of silicon dioxide (SiO 2 ), though minute amounts of other chemicals are often added. Highly purified silica powder was used in the now-outmoded crucible manufacturing method, while liquid silicon tetrachloride (SiCl 4 ) in a gaseous stream of pure oxygen (02) is the principal source of silicon for the vapor deposition method currently in widespread use. Other chemical compounds such as germanium tetrachloride (GeCl 4 ) and phosphorus oxychloride (POC1 3 ) can be used to produce core fibers and outer shells, or claddings, with function-specific optical properties.

Because the purity and chemical composition of the glass used in optical fibers determine the most important characteristic of a fiber—degree of attenuation—research now focuses on developing glasses with the highest possible purity. Glasses with a high fluoride content hold the most promise for improving optical fiber performance because they are transparent to almost the entire range of visible light frequencies. This makes them especially valuable for multimode optical fibers, which can transmit hundreds of discrete light wave signals concurrently.

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Fiber-optic communication is a method of transmitting information from one place to another by sending pulses of light through an optical fiber. The light forms an electromagnetic carrier wave that is modulated to carry information.[1] Fiber is preferred over electrical cabling when high bandwidth, long distance, or immunity to electromagnetic interference are required.


Optical fiber is used by many telecommunications companies to transmit telephone signals, Internet communication, and cable television signals. Researchers at Bell Labs have reached internet speeds of over 100 petabit×kilometer per second using fiber-optic communication

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