Nt 1320 Unit 9. Assignment 1. Transmitters

In: Computers and Technology

Submitted By Spider5217
Words 312
Pages 2
LEDs Transmitter
LEDs has a much lower power output than lasers and their bigger the light output pattern makes it harder to couple into fiber limiting the LED to be used with multimode fibers, LEDs have less bandwidth than a laser and are limited to operate up to about 250 MHz or around 200 Mbs. But of the way the LEDs are fabricated they are cheaper to make than lasers, they contain no hazardous material and last up to 10,000 hours. LEDs have a very small broad output which causes them to suffer chromatic dispersion in fiber. The bulbs create less heat during use which can lead to lower cooling costs and its green friendly, decreases amount of energy used by 5%.
Laser Transmitter
Laser transmitter have a much smaller and tighter light input and can be easily coupled to singlemode fibers, this make the laser transmitter perfect for longer distances and high speed links. Laser has a high bandwidth capability some are used up to 10 GHz or 10 Gbps this makes Laser transmitters more expensive. Laser Transmitters have a narrow spectral output that suffers very little chromatic dispersion. Laser Transmitters avoid interference because the frequencies between the lasers have narrow beams that are less likely to have significant sidelobes that could introduce interference.
They could be applied when two or more buildings want to be connected to the same network or just to connect to or more networks. The transmitter takes an electron input and converts it to optical output from a laser or a LED. The light from the transmitter is then coupled into the fiber with a connector and transmitted through the fiber cable. Then the light form the end of the fiber is coupled to a receiver where and is transmitted through the fiber optical cable which is then properly use by the receiving…...

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