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CWDM (Coarse Wavelength Division Multiplexing) is a method of combining multiple signals on laser beams at various wavelengths for transmission along fiber optic cables. This means the number of channels is more than in standard wavelength division multiplexing (WDM) but fewer than in dense wavelength division multiplexing (DWDM). With CWDM, channels are set at wavelengths spaced 20 nanometers (nm) apart, compared with 0.4 nm spacing for DWDM which allows the use of low-cost, uncooled lasers for CWDM. A typical CWDM system will have laser emissions that occur on eight channels at eight defined wavelengths: 1610 nm, 1590 nm, 1570 nm, 1550 nm, 1530 nm, 1510 nm, 1490 nm, and 1470 nm. But up to 18 different channels are allowed, with wavelengths ranging down to 1270 nm. The energy from the lasers in a CWDM system is spread out over a larger range of wavelengths than is the energy from the lasers in a DWDM system. Due to the use of lasers with lower precision, a CWDM system is less expensive and consumes less power.
Coastcom' premiere CWDM product offerings enable carriers and enterprises to efficiently and cost-effectively transport multiple different protocols on a single fiber strand or fiber pair using the latest CWDM technology.
Review Coastcom's CWDM options from the menu to the left.
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