Abstract
World-first coexistence trial of TDM and CDM giga-bit passive optical
networks (PONs) was successfully completed. A very shallow minimum isolation
of 7 dB between G- and CDM-PON at OLT and ONU in the ITU-T G.984.5 enhancement
band was demonstrated. The feasibility of bidirectional transmission on the
same wavelength was confirmed. The backscattering optical noise does not seriously
affect the maximum reach of CDM-PON. Adding the CDM-PON onto GPON can provide
following technical and economical impacts: low-cost coexistence, minimum
service outage, and combination of best-effort and guaranteed-bandwidth for
efficient and high-quality network services due to CDM feature.
© 2009 IEEE
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