Drop and insert multiplexing with simultaneous clock recovery using an electroabsorption modulator

Ian Phillips*, A. Gloag, D.G. Moodie, Nick Doran, Ian Bennion, Andrew Ellis

*Corresponding author for this work

Research output: Contribution to journalArticle


A three-node optical time-division multiplexing (OTDM) network is demonstrated that utilizes electroabsorption (EA) modulators as the core elements. Each node is self contained and performs its own clock recovery and synchronization. "Drop and insert" functionality is demonstrated for the first time with an EA modulator by completely removing a 10-Gb/s channel from a 40-Gb/s OTDM data stream. A different 10-Gb/s channel was subsequently inserted into the vacant time slot. Clock recovery is achieved by using an EA modulator in a novel bidirectional configuration. Bit-error-rate (BER) measurements are presented for each of the 10-Gb/s OTDM channels.

Original languageEnglish
Pages (from-to)291-293
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number2
Publication statusPublished - Feb 1998



  • clock recovery
  • drop and insert multiplexing
  • electroabsorption modulator
  • OTDM demultiplexing
  • phase-locked loop

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