Abstract

To realize ultra-fast optical time-division multiplexing (OTDM) transmission systems, clock recovery is an essential operation of a receiver as well as of a regenerator. For subharmonic clock extraction from data signals beyond 100 Gbit/s, a phase-locked loop (PLL) with an optical or optoelectrical phase comparator1–3 is a promising method among the many methods proposed and demonstrated so far. In 160 Gbit/s OTDM experiments, a base-rate frequency of 10 GHz is usually used up to now.

© 2002 Optical Society of America

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