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Registered Member #2063
Joined: Sat Apr 04 2009, 03:16PM
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Posts: 352
so the point of using optical fiber to send light pulses to transmit information at light speed right? dont electricity flow through a copper cable at light speed as well? or does it have to do with the high frequency signals transmitting back and forth, where copper cable acts like an antena and radiate the signal away thus degrading the signal over long distances? or simply copper cables just can't handle such high frequency signals?
The energy that current flow to transfer can be said to be moved effectively at light speed. But even that is debatable.
Electrical conductors can handle very high frequencies, but only so many channels, before you can't multiplex another packet line down the cable.
Fiber optics moves the data near instantaneously, but the best part is the AMOUNT that it can move with such ease. You only need about 5mws of light to cover 3 miles of fiber lines. So they typically are more efficient than ethernet lines for example.
Multiplexing is the most beautiful part of fiber optics. Each laser diode that injects light into the line can be modulated to speeds of 10Gb/s. That's about 100 nicely paced internet connections. But what's best, is that up to 160 wavelengths, or separate diode lasers can be channeled into one fiber, and then separated again at the receiving end. 160 channels with such speeds allow for mind boggling fast networks.
Verizon is one example of a Telecomm Co. that uses fiber to their advantage. I don't remember when, but sometime ago, an small earthquake broke the 3 of the main fiber lines that fed California's Verizon connectivity to the rest of the country. At that very instant, when the lines broke, their network automatically rerouted all calls and texts back to one line which fed everything back into Ca from a fiber that drops in from Oregon. Taking on 5x the bandwidth that it normally ran at, the network kept the connection, and not one call was dropped.
Fiber optics are fast, efficient, and real work horses!
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why is fiber optical cable network faster?
