We’re used to the idea of information traveling in different ways. When we speak into a landline telephone, a wire cable carries the sounds from our voice into a socket in the wall, where another cable takes it to the local telephone exchange. Cellphones work a different way: they send and receive information using invisible radio waves—a technology called wireless because it uses no cables. Fiber optics works a third way. It sends information coded in a beam of light down a glass or plastic pipe. It was originally developed for endoscopes in the 1950s to help doctors see inside the human body without having to cut it open first. In the 1960s, engineers found a way of using the same technology to transmit telephone calls at the speed of light (normally that’s 186,000 miles or 300,000 km per second in a vacuum, but slows to about two thirds this speed in a fiber-optic cable).
Optical technology for o-pf company .
A fiber-optic cable is made up of incredibly thin strands of glass or plastic known as optical fibers; one cable can have as few as two strands or as many as several hundred. Each strand is less than a tenth as thick as a human hair and can carry something like 25,000 telephone calls, so an entire fiber-optic cable can easily carry several million calls. The current record for a “single-mode” fiber (that’s explained below) is 178 terabits (trillion bits) per second—enough for 100 million Zoom sessions (according to fiber expert Jeff Hecht)!
Fiber-optic cables carry information between two locations using purely optical (light-based) technology. Suppose you wanted to send data from your computer to your friend’s house down the street using fiber optics. You can connect your computer to a laser, which will convert electrical data from the computer into a series of light pulses. Then you want to fire the laser down the fiber optic cable. After traveling down the wire, the light rays will emerge at the other end. Your friend needs a photoelectric cell (light-detecting element) to convert the light pulses into electrical information that his computer can understand. So the whole device would be a really neat, high-tech version of the kind of telephone you could make out of two baked-bean cans and a length of string!
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Post by Pranta Saha CEO at Tizen
