O. OZOLINS ET AL.
Copyright © 2013 SciRes. OPJ
341
4. Conclusions
The cascadability of uniform fibre Bragg grating of 40
Gbit/s RZ-OOK to NRZ-OOK format conversion has
been demonstrated numerically for the first time. The
best BER performance is obtained after three cascades of
uniform FBG with 60% reflectivity. It has been found
that uniform FBG RZ-OOK to NRZ-OOK format con-
verter must have Gaussian like pass band which is con-
nected with rather low reflectivity value to reduce am-
plitude ripples in converted signal waveform and side
lobe minimums must be chosen to match side tones of
RZ-OOK signal for conversion.
5. Acknowledgements
This work has been supported by the European Regional
Development Fund within the project Nr. 2010/0270/
2DP/2.1.1.1.0/10/APIA/VIAA/002.
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