The Role of WDM in Optical Access Networks

Introduction General Flavours of WDM-PON Pure TDM PON Pure WDM-PON Combined TDM and WDM-PON Other Variants and Combinations Drivers and Requirements for WDM-PON Support Growing Residential Bandwidth Per-customer service flexibility Wavelength Unbundling CO Consolidation Backhaul for Remote DSL Nodes or Wireless Nodes Business access Other requirements or drivers Summary of requirements Challenges Component Integration in the CO Filtering the Downstream Wavelength (Colourless ONTs) Tuning the Upstream Wavelength (Colourless ONTs) Solutions 1. Near Term TWDM-PON 2. Mid Term TWDM-PON Options 3. Early WDM-PON Options 4. Long Term WDM-PON Options Summary Conclusions References