CWDM/DWDM

CWDM and DWDM are two key techniques used in WDM wavelength division multiplexing, which enable transmitting multiple signals of different wavelengths in a single optical fibre. CWDM (Coarse Wavelength Division Multiplexing) enables transmission of up to 18 channels with wavelengths ranging from 1271 nm to 1611 nm. DWDM (Dense Wavelength Division Multiplexing) enables transmission of up to 96 channels, however, many solutions offer 16, 40 and 80 channels, respectively. What is more, DWDM offers greater range than CWDM, up to several thousand kilometres.

These techniques allow for more efficient use of fibre optics, and they are characterised by compatibility with all network devices, as well as scalability, enabling adding new channels for demand. They also offer transparency – the signal is not impacted in any way by having a WDM system in place.

The use of CWDM and DWDM devices in the existing or new transport network makes it highly reliable and efficient, while allowing them to take full advantage of the transmission capacity of the optical fibre – as a result, you save money on expanding the cable network. This makes building new services much faster and more convenient, and thanks to advanced monitoring functions, maintenance of DWDM network is much easier. What is more, sending multiple signals via a single fibre allows for more efficient use of existing infrastructure.

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