dc.contributor |
Universitat Politècnica de Catalunya. Departament d'Òptica i Optometria |
dc.contributor |
Peucheret, Christophe |
dc.contributor |
Seoane, Jorge |
dc.contributor.author |
Cano Adalid, Javier |
dc.date |
2009-03 |
dc.identifier.uri |
http://hdl.handle.net/2099.1/7306 |
dc.language.iso |
cat |
dc.publisher |
Universitat Politècnica de Catalunya |
dc.rights |
Attribution-NonCommercial-NoDerivs 3.0 Spain |
dc.rights |
info:eu-repo/semantics/openAccess |
dc.rights |
http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
dc.subject |
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Telecomunicació òptica |
dc.subject |
Optical communications |
dc.subject |
Modulation (Electronics) |
dc.subject |
OOK (On-Off Keying) |
dc.subject |
PSK (Phrase-shift kying) |
dc.subject |
Comunicacions òptiques |
dc.subject |
Modulació (Electrònica) |
dc.title |
Modulation Format Conversion in Future Optical Networks |
dc.type |
info:eu-repo/semantics/bachelorThesis |
dc.description.abstract |
Projecte realitzat en col.laboració amb el centre DTU(Technical University of Denmark) |
dc.description.abstract |
The signal generation and receiver schemes of different modulation formats such as
on off keying (OOK) in either non‐return to zero (NRZ) or return to zero (RZ),
correlative coding and phase‐shift keying (PSK) are described and numerically
simulated. Their receiver sensitivities for back to back structure are numerically
simulated at 40 Gb/s and compared. The results show how using balanced reception,
DPSK has the benefit of approximately 3 dB. We demonstrate that duobinary
modulation is characterized by a higher tolerance to the chromatic dispersion in
comparison with NRZ. Conversion techniques between modulation formats are
described. Different all optical format conversion based on the mentioned method are
discussed. Finally, format conversion from RZ‐OOK to RZ‐DPSK based on HNLF
nonlinearities is investigated in great detail and numerically simulated at 40 Gb/s.
Some converter requirements such as powers, wavelengths, bandwidths, pulse widths
and pulse shapes among other are studied. The results show that shorter pulse widths
in control signal for the case of walk‐off presence provide worse conversion. Sensitivity of converted RZ‐DPSK is compared with a conventional 33RZ‐DPSK signal showing a
penalty close to 4 dB. Finally, the effect of the control wavelength variation at the
input of the converter is investigated when the probe signal corresponds with
conventional 33%RZ, 50%RZ and 67%RZ duty cycle. |