20.01.2014 Views

Workshop proceeding - final.pdf - Faculty of Information and ...

Workshop proceeding - final.pdf - Faculty of Information and ...

Workshop proceeding - final.pdf - Faculty of Information and ...

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

Fiber Nonlinearity Precompensation for Long-hual links using Direct-<br />

Detection Optical OFDM<br />

Liang B. Y. Du 1 * <strong>and</strong> Arthur J. Lowery 1<br />

1. Electrical <strong>and</strong> Computer Systems Engineering, Monash University, Clayton, VIC 3800,<br />

Australia<br />

The use <strong>of</strong> nonlinearity precompensation in direct-detection optical orthogonal frequency<br />

division multiplexed links is investigated by simulation. Because <strong>of</strong> the presence <strong>of</strong> a strong<br />

optical carrier its performance is poorer than for coherent systems: with compensation the<br />

signal quality is found to vary almost periodically across the signal b<strong>and</strong>. We propose <strong>and</strong><br />

explain the operation <strong>of</strong> two optical, one electrical <strong>and</strong> one computational method <strong>of</strong><br />

removing this periodic variation. Optical filtering <strong>of</strong> one sideb<strong>and</strong> at the receiver is most<br />

effective, but a substantial improvement can be obtained by a simple modification to the<br />

precompensation algorithm.<br />

163

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!