An upgradeable WDM-PON for broadcast and LAN services

We present a novel Wavelength-division-multiplexed passive optical network (WDM-PON) architecture for broadcast and local area network (LAN) services. The virtual ring LAN in the system can be utilized to not only realize LAN services but also provide broadcast services and extra point-to-point (P2P) bandwidth for optical network units (ONUs). A simulation study is performed to demonstrate this scheme. Its result indicates the LAN signals achieve optimum performance when extinction ratio (ER) is 4 dB.