In-band clock distribution concept for ultra-high bit rates OTDM system

Abstract

A novel clock distribution concept based on in-band phase-modulated pilot insertion is demonstrated. This method avoids the need for an ultrafast phase comparator and a phase-locked loop in the receiver. Experimental results show that the clock can be successfully extracted from 160 Gbit/s optical time-division multiplexing (OTDM) data signal and employed for demultiplexing of 40 Gbit/s tributaries. The in-band clock distribution introduces 1.5 dB of power penalty with an error-free performance.

Keywords

optical time-division multiplexing (OTDM) / clock recovery / in-band clock distribution / phase-modulated pilot insertion

References

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Acknowledgements

The authors would like to thank Prof. Harm J S Dorren from Eindhoven University of Technology for useful discussion and collaboration. This work was supported by the National Natural Science Foundation of China (Grant Nos. 60736038, 60907008, and 60925019) and the Education Ministry Funds of China for New Teachers (Nos. 200806141102 and 20090185120027).

RIGHTS & PERMISSIONS

2014 Higher Education Press and Springer-Verlag Berlin Heidelberg