Optical and Quantum Electronics

, Volume 13, Issue 4, pp 309–322 | Cite as

A simple timing circuit for optical PCM repeaters

  • A. Luvison
  • G. Pirani
  • U. Mengali


A simple synchronization system is proposed for timing recovery in optical PCM repeaters. The basic idea is to exploit the spectral line at the transmission rate, which is already present in the unipolar symbol stream travelling along the fibre. Since a nonlinear circuit is no longer needed, the amplified signal at the photodetector output is directly filtered by a resonant circuit to give the clock recovery by means of a zero-crossing detector. The limits of effectiveness of this synchronization system are then discussed, especially with regard to the accumulation of timing jitter as well as of alignment error.


Communication Network Spectral Line Timing Recovery Transmission Rate Alignment Error 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Chapman and Hall 1981

Authors and Affiliations

  • A. Luvison
    • 1
  • G. Pirani
    • 1
  • U. Mengali
    • 2
  1. 1.CSELTTorinoItaly
  2. 2.Department of Electrical EngineeringUniversity of PisaPisaItaly

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