Abstract
We propose a return-to-zero on-off keying (RZ-OOK) to non-return-to-zero
(NRZ) OOK conversion scheme based on a single custom-designed fiber Bragg grating
(FBG). The custom-made FBG is designed and synthesized using discrete layer-peeling
algorithm. It is shown that such a FBG can replace the combination of interferometer
and the cascaded filter that are invariably employed together in the reported
schemes for RZ-OOK to NRZ-OOK format conversion. Simulation results show that the
input 20-Gb/s RZ-OOK signals with different duty cycles can be converted into
NRZ-OOK signals with high Q-factor.
© 2014 Chinese Optics Letters
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