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Transmission Technology: what’s the big deal? - page 12 / 46

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Optical System Limitations

Optical amplifiers generate noise

Total noise is proportional to number of amplifiers x gain of each amplifier

Various effects limit the amount of optical power that can be launched

At the receiver, the signal power must be some fixed ratio larger than the noise (OSNR)

Combined, these effects constrain the length and capacity of a given system.

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