Ultrafast Phase Comparator for Phase-Locked Loop-Based Optoelectronic Clock Recovery Systems

F. Gomez-Agis, Leif Katsuo Oxenløwe, S. Kurimura, C. Ware, Hans Christian Hansen Mulvad, Michael Galili, D. Erasme

Research output: Contribution to journalJournal articlepeer-review


The authors report on a novel application of a chi((2)) nonlinear optical device as an ultrafast phase comparator, an essential element that allows an optoelectronic phase-locked loop to perform clock recovery of ultrahigh-speed optical time-division multiplexed (OTDM) signals. Particular interest is devoted to a quasi-phase-matching adhered-ridge-waveguide periodically poled lithium niobate (PPLN) device, which shows a sufficient high temporal resolution to resolve a 640 Gbits OTDM signal.
Original languageEnglish
JournalJournal of Lightwave Technology
Issue number13
Pages (from-to)2439-2448
Publication statusPublished - 2009


  • periodically poled lithium niobate (PPLN)
  • optical communication
  • nonlinear optics
  • optical time division multiplexing (OTDM)
  • optical phase matching
  • optoelectronic phase-locked loop (OEPLL)
  • Clock recovery (CR)
  • optical signal processing


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