During we know communication technology through Cable and Wireless . Communications over Cable can be done, for example, by telephone home. The communication Cordless phone mobile (cell phone ). When communicating with home phone, microphone convert sound into electrical signals which are sent via cable to the receiver.
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Usually cable was made of copper. But now cable copper has been replaced optic cable. There is some excess cable compared with optical copper cable. First, cheaper. Second, more thin and light so that save space. Third, level of information loss distributed relatively more low so that more efficient power. Fourth, a single cable can consist of optical hundreds of fiber optic signals. Inter-fibre not interfere, so that communication through phone or acceptance television broadcasts over the net. Fifth, the volume of information optical fiber that can be brought distance telephone network through larger, namely between And 600 000 200 000 conversation. In fact, cable copper carries only between 10 and 20 conversation. Sixth, on the phone signals copper cables should be strengthened again every 2 km with a signal amplifier (Repeater), which is relatively expensive. In optical fibers, attenuation very little signal. So the distance inter-repeater can be far apart up to 100 km. Currently, Japan and the United States is developing the use of lasers as light in a fiber amplifier optics. Thus the signals carried can survive up to 1000 km without the "refreshed" by repeater. Seventh, no fiber optic affected by disturbances natural electromagnetic, such as lightning, storms, solar radio waves. Also unaffected electromagnetic interference artificial, like a radio transmitter radio and radar. Eighth, more optical fibers suitable for data transmission digital. In addition, the use optical fiber does not allow wired data information, without cause attenuation signal a bull run. Ninth, no fiber optic conductance so safe from harm fire. Tenth, fiber more flexible than optical copper cable. For data communications telemetry, fiber optics is now installed in many Latest computer. With two copper wires untwisted, the computer can transmit data 150-200 letters per second. Now with coaxial cable can send up to 1.5 million letters per second. Fiber optics certain type and length certain waves can distribute 15 million-20 million letters per second.
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