Optics & Photonics

Optical Telecommunications

A method of transmitting information from one place to another by sending pulses of light through an optical fiber is known as Optical telecommunication. Light makes an electromagnetic carrier wave that is modulated to carry information. High bandwidth, long distance, or immunity to electromagnetic interference is required for the electrical cabling over a fiber optical media. In many telecommunications companies to transmit telephone signals, Internet communication, and cable television signals Optical fiber is used. At Bell Labs researchers have reached internet speeds of over 100 petabytes per second using fiber-optic communication.

Companies like AT&T, MCI, and U.S. Sprint use optical fibre cable to hold plain old telephone company (POTS) across their nationwide networks. Since its invention within the early Seventies, the utilization of and demand for optical fibre have full-grown hugely. The uses of fiber these days are quite varied. With the explosion of data traffic because of the web, electronic commerce, pc networks, multimedia, voice, data, and video, the requirement for a transmission medium with the bandwidth capabilities for handling such large amounts of data is overriding. native telephone company providers use fiber to hold this same service between office switches at additional native levels, and generally as so much as the neighbourhood or individual home. fibre is also used extensively for transmission of information signals. Fiber optics, with its relatively infinite bandwidth, has proved to be the solution.

• Semaphore line
• Semaphore signal flags
• Optical fiber
• Signal lamps
• Photophone
• Free-space optical communication
• Heliograph