What does CWDM stand for in fiber?

The acronym stands for Coarse Wavelength Division Multiplexing. As the name states, it is a form of multiplexed fiber optics, so CWDM networks can send simultaneous, two-way communication. The term “coarse” refers to the wavelength spacing between channels.

What is CWDM module?

CWDM modules (Coarse Wave Division Multiplexing) combine or split up to 18 wavelengths into a single fiber. CWDM technology uses ITU standard 20nm spacing between the wavelengths, from 1270nm to 1610nm. CWDM Modules utilize thin-film coating and micro optics package technology.

What is the range of CWDM and DWDM?

DWDM vs CWDM wavelength spectrum CWDM systems typically transport eight wavelengths with a channel spacing of 20 nm in the spectrum grid from 1470 nm to 1610 nm. DWDM systems, on the other hand, can carry 40, 80, 96 or up to 160 wavelengths by utilizing a much narrower spacing 0.8/0.4 nm (100 GHz/50 GHz grid).

How does a CWDM work?

It works by combining optical signals of different wavelengths on one strand of fiber. Usually, CWDM is able to transport up to 18 wavelengths with a channel spacing of 20 nm in the spectrum grid from 1270 nm to 1610 nm.

What is CWDM used for?

CWDM is a flexible technology that can be deployed to expand the capacity of a fiber network. It is a compact, cost-effective technology option when spectral efficiency or the need to span long distances under 80 km are not important requirements.

What is the applications of CWDM systems?

CWDM Applications CWDM is being used in cable television networks, where different wavelengths are used for the downstream and upstream signals. In these systems, the wavelengths used are often widely separated. For example, the downstream signal might be at 1310 nm while the upstream signal is at 1550 nm.

How does DWDM work?

DWDM works by combining and transmitting multiple signals simultaneously at different wavelengths on the same fiber. The technology creates multiple virtual fibers, thus multiplying the capacity of the physical medium.