Fiber Nonlinearities and Their Impact on Transmission Systems
Fiber Nonlinearities and Their Impact on Transmission Systems
Fiber Nonlinearities and Their Impact on Transmission Systems
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Stimulated Brillouin Scattering (SBS)<br />
• SBS occurs when the incident light is of<br />
sufficiently high intensity (a few mW)<br />
• The SBS threshold is defined as the input power<br />
at which the scattered power grows as large as<br />
the input power<br />
• System impact:<br />
– When signal power is transferred in a backward directi<strong>on</strong> it<br />
can deplete the forward traveling signal<br />
– The transmitted power grows linearly with input power for<br />
low input powers, but saturates for higher input powers (gain<br />
compressi<strong>on</strong>)<br />
– This limiting behavior is also accompanied by a dramatic<br />
increase in intensity noise<br />
Tuesday, March 22, 2005<br />
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