The Coarse Wavelength Division Multiplexing (CWDM) is the method of combining the multiple signals on laser beams for transmission along fiber optic cables. The number of channels is less in CWDM rather than in standard Wavelength Division Multiplexing (WDM). A CWDM MX DEMUX is used for increasing the current fiber cable capacity by transmitting multiple wavelengths, typically up to 18 separate signals over one fiber. It is a passive device, very reliable and simple to use.
What is the basic difference between a MUX and DEMUX?
A Multiplexer (or MUX) is a device that is selecting one of several analog or digital input signals into a single line. The data distributor is known as Demux for short and it is the exact opposite of the multiplexer. The multiplexer is a device that is taking a single input signal and selecting one of the data-output-lines to the single input.
CWDM is supporting up to 18 wavelength channels transmitted through a fiber at the same time. The different wavelengths of channels are 20nm apart in CWDM and DWDM support 80 simultaneous channels with each channel only 0.8nm apart. CWDM is the most efficient solution for shorter distances of up to 70 kilometers. CWDM also tends to be limited to supporting 8 channels for the distance between 40 and 70 kilometers. But, unlike CWDM, DWDM can be amplified and used for transmitting data along long distances.
CWDM components are cheaper and popular than DWDM. Both the solutions are available as an active or passive system and DWDM is the technology for greenfield installations. In CWDM, the energy from the laser is spread over a larger range of wavelengths as compared to the DWDM system. The tolerance in a CWDM laser is up to more or less 3nm. But the tolerance is tighter in a DWDM system. The maximum realizable distance between the nodes is smaller with CWDM.
Details about CWDM Mux/Demux System Installation Components
The basic ingredients of a CWDM MUX-DEMUX system comprise a Local unit, a Remote unit, and the CWDM MUX DEMUX module. A chassis should be installed first to hold the module and install CWDM SFP transceivers in the switch to connect a CWDM MUX DEMUX module to a switch. Also, the energy from the lasers in a CWDM system is spread out over a larger range of wavelengths.
Transmission is the vital factor in transferring signals along the optical fiber. Get the best CWDM Mux/Demux price in China as the production cost is less in the place. The orders can be made online easily and get the transmission object now at the most effective pricing.