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WDM, CWDM, DWDM NetworkingWavelength Division Multiplexer (WDM) is a technology that multiplexes several streams of signals (data/storage/video or voice) over a single optical fiber by using several wavelengths (frequencies), using light from a laser or a LED. WDM enables bi-directional communication and cost efficient upgrade of capacity in optical networks. There are two types of WDM architecture: Coarse Wavelength Multiplexing (CWDM) and Dense Wavelength Division Multiplexing (DWDM).

CWDM systems typically provide 8 wavelengths, separated by 20nm, from 1470nm to 1610nm. In order to increase the number of wavelengths, one can also use the 1310nm window so the CWDM channels can be increased to 16. The number of channels is fewer than in DWDM but more than in standard WDM. DWDM packing WDM channels denser than in CWDM system, it can go up to 80 or even 160 channels / wavelengths, with no more than 0.4nm spacing, roughly over the C-band range of wavelengths. DWDM's tighter wavelength spacing fits more channels onto a single fiber, but cost more to implement and operate.

Typical CWDM spectrum supports data transport rates of up to 4.25Gbps while DWDM is utilized more for large capacity data transport needs of up to 100Gbps. By mapping DWDM channels within the CWDM wavelength spectrum, much higher data transport capacity on the same fiber optic cable can be achieved without any need for changing the esxisting fiber infrastructure between the network sites. By utilizing CWDM and DWDM network systems or the mixture of them, carriers and enterprisers are able to transport service from 2Mbps up to 200Gbps of data.

We offer a wide range of WDM optical networking products that allow transport of any mix of service from 2Mbps up to 200Gbps. Our highly reliable WDM/CWDM/DWDM products include CWDM multiplexer, DWDM Multiplexer, CWDM & DWDM Optical Add-drop Multiplexer, WDM Filter, optical amplifiers, OEO converter as well as many other most demanding CWDM DWDM networking infrastructure equipment.
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