Demonstration and application of a monolithic Two-PONs-In-One device

We have successfully designed and fabricated a 2P1 passive optical network device that functions transparently as a dense WDM around 1.55 /spl mu/m and as a power splitter around 1.31 /spl mu/m. The dense WDM and the power splitter are combined with coarse WDMs on a single chip using conventional silica waveguide technology. The device has potential applications in optical communications networks.