Simple, Robust, and Wide-Range Frequency Offset Monitor for Automatic Frequency Control in Digital Coherent Receivers

Conference: ECOC 2007 - 33rd European Conference and Exhibition of Optical Communication
09/16/2007 - 09/20/2007 at Berlin, Germany

Proceedings: ECOC 2007

Pages: 2Language: englishTyp: PDF

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Tao, Z.; Zhang, H.; Li, L. (Fujitsu R&D Center Ltd., Beijing, P. R. China)
Isomura, A.; Hoshida, T.; Rasmussen, J. C. (Fujitsu Laboratories Ltd., Kawasaki, Japan)

We demonstrate a simple, robust and +/-10 GHz range frequency offset monitor used for automatic local laser frequency control in optical digital coherent receiver. It can tolerate low OSNR, large distortion and unsynchronized clock.