Compact silicon multicast switch for pCDC ROADM based on thermooptic Mach-Zehnder interferometers

We propose an optimized multicast switch for colorless, directionless and partially contentionless ROADM and experimentally demonstrate a 2×8 silicon multicast switch, which consists of six 3-dB multimode interference splitters and four Mach-Zehnder 2×2 optical switches.