Help & Advice

Our experts are on hand to guide you to the right solutions

> Click for support

CWDM / DWDM Applications

ETL's StingRay CWDM & DWDM range of RF over Fibre products have been designed for high density & long distances of up to 45km (CWDM) & 500km (DWDM). 

CWDM (Coarse Wavelength Division Multiplexing) is a low-cost solution for transmitting multiple wavelengths on a single optical fibre link (< 35 km),without optical amplification. There are 16 optical channels altogether, ETL offer 8 optical channels to avoid using the lowest wavelength channels due to the high attenuation losses.

DWDM (Dense Wavelength Division Multiplexing) systems are characterised by a narrower channel spacing than CWDM, as defined in ITU-T G.694.1, and therefore can allow up to 40 multiplexed channels. Unlike CWDM, the transmissiodn distance of DWDM channels can be extended easily for hundreds of kilometres by using an optical amplification to compensate the losses and boost the optical power.