VOA multiplexer, or VMUX, combines up to 48 individually-controllable VOAs with a 48-channel AWG in a single compact module. The VMUX is ideal for power leveling, prior to amplification in DWDM systems and can be used in optical add drop multiplexer (OADM) configurations. Integrated products, such as VOA multiplexers, which combine multiple different functions onto a single PLC chip provide a compact cost-effective solution for optical network needs.