IP & DWDM Network Solutions

 

OADM (Optical Add-Drop Multiplexer)

OADM is a critical device used in wavelength-division multiplexing systems for multiplexing and routing different channels of light into or out of a single mode fiber. It is the fundamental constructional block of optical telecommunications networks.

FOADM

The FOADM is a traditional wavelength arrangement scheme that can only input or output a single wavelength via the fixed port. FOADM is used to add or drop a certain set of wavelengths dedicated to specific DWDM channels. It allows the manufacturer to customize the number of channels, filter specifications, and power equalization but require excessive transporters at each node. Besides, in FOADM systems, manual adjustments are required because channels are added or dropped. And optical-to-electrical and electrical-to-optical alterations are also necessary.

ROADM

 The ROADM is a dynamic wavelength arrangement scheme, which allows for dynamic wavelength arrangement scheme. It uses a Wavelength Selective Switch (WSS). The WSS has an 8-dimensional cross-connect and provides quick service start-up, remote cross-connect, and WDM mesh networking. The ROADM scheme also allows inputting or outputting a single wavelength or wavelength group via the fixed port. In ROADM systems, we don’t need to convert the optical signals to electrical signals and route those signals by using conventional electronic switches then convert back again to optical signals just like FOADM does. ROADM can configure as required without affecting traffic.