Contents 1 Introduction
Reconfigurable Optical Add-Drop Mupltiplexer (ROADM) allows to remotely reconfigure wavelengths in a Dense Wavelength Division Multiplexing (DWDM) optical network offering service providers the flexibility that eventually results in reduced operational expenses. A succesful platform for a 2-degree ROADM is silica on silicon Planar Lightwave Circuit (PLC) technology. Providing high degree of integration, good reliability PLC-based ROADM module is highly manufacturable, cost-effective and therefore is finding its way for use in metropolitan edge and access networks. ROADM channel count is equal to the number of wavelengths that it can support.
