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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An Overview of <str<strong>on</strong>g>Fiber</str<strong>on</strong>g> <str<strong>on</strong>g>N<strong>on</strong>linearities</str<strong>on</strong>g><br />
• N<strong>on</strong>linear interacti<strong>on</strong>s between two signals in a<br />
fiber can be expressed by the change in the<br />
electric field of <strong>on</strong>e of the signals caused by the<br />
other<br />
E ( z + dz)<br />
= E1(<br />
z)exp[(<br />
−α<br />
/ 2 + ik)<br />
dz + gP2<br />
( z)<br />
dz / 2A<br />
1 e<br />
Where α is the loss coefficient, g is the frequency-<br />
dependent gain coefficient of the n<strong>on</strong>linear<br />
process, <str<strong>on</strong>g>and</str<strong>on</strong>g> A e is the effective area of the fiber<br />
• For more complex situati<strong>on</strong>s the n<strong>on</strong>linear<br />
Schrödinger equati<strong>on</strong> needs to be solved<br />
]<br />
Tuesday, March 22, 2005<br />
7(32)
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