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Access and metro networks based on WDM technologies

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4 Author(s)
Iwatsuki, K. ; NTT Access Network Service Syst. Labs., NTT Corp., Chiba, Japan ; Jun-ichi Kani ; Suzuki, H. ; Fujiwara, M.

This paper describes the technical issues of access and metro networks based on wavelength division multiplexing (WDM) technologies, some solutions, and an experimental demonstration. A WDM star access network with colorless optical network units (ONUs) is proposed. For realizing the colorless ONU, two approaches are introduced; optical carrier supply and spectrum slicing. In addition, a WDM metro ring network with scalable optical add/drop multiplexers (OADMs), namely the tapped-type OADM, is proposed to effectively accommodate the large amount of traffic issued from access networks. Prototypes are constructed and used to verify the feasibility of the proposed WDM technologies.

Published in:

Lightwave Technology, Journal of  (Volume:22 ,  Issue: 11 )

Date of Publication:

Nov. 2004

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