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Scalability of a Metropolitan Bidirectional Multifiber WDM-Ring Network

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Abstract

We analyze the scalability of a metropolitan bidirectional multifiber wavelength-division-multiplexed (WDM) ring network. The analysis is carried out by using a bidirectional transmission model for optical networks and by building an experimental network. The model includes major limiting factors in WDM-ring networks such as relative intensity noise (RIN) due to multiple Rayleigh backscattering, amplified spontaneous emission (ASE) accumulation in a cascade of bidirectional erbium-doped fiber amplifiers (EDFA), tilting of the EDFA gain spectrum and input saturation power of the EDFA. We found that in metropolitan areas the scalability of a WDM-ring network using bidirectional transmission is not mainly limited by the RIN arising from the Rayleigh backscattering. The result was verified experimentally. The maximum size of the demonstrated network is 33–43 nodes with a spacing of 5–10 km between nodes. With this spacing, which is typical in metropolitan areas, the scalability of the network is mainly limited by the gain tilt and the input saturation power of the EDFA.

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Authors and Affiliations

  1. Microelectronics Centre, VTT Electronics, Tekniikantie 17, P.O. Box 1101, 02044 VTT, Finland

    Kalle Ylä-Jarkko & Matti Leppihalme

  2. Liekki Ltd, Finland

    Simo Tammela

  3. Metrology Research Institute, Helsinki University of Technology, Finland

    Tapio Niemi

  4. Nokia Research Center, Finland

    Ari Tervonen

Authors
  1. Kalle Ylä-Jarkko
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  2. Matti Leppihalme
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  4. Tapio Niemi
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  5. Ari Tervonen
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Ylä-Jarkko, K., Leppihalme, M., Tammela, S. et al. Scalability of a Metropolitan Bidirectional Multifiber WDM-Ring Network. Photonic Network Communications 3, 349–362 (2001). https://doi.org/10.1023/A:1011908028357

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