ITU CWDM / DWDM Channels Guide

ITU CWDM / DWDM Channels Guide

DWDM/CWDM Wavelength Guide

CWDM (Coarse Wavelength Multiplexing) and DWDM (Dense Wavelength Division Multiplexing) allow telecommunications companies to provide more services through their existing fiber infrastructure by combining multiple wavelengths on a single fiber. Everiont offers a range of CWDM/DWDM solutions and products that help you reduce your existing fiber usage in a reliable and cost-effective way.

Overview of ITU CWDM channels

ITU-T G.694.2 defines 18 wavelengths for CWDM transmission from 1270 to 1610 nm with 20 nm spacing. The wavelength of the complete CWDM network is shown in the figure below. Each CWDM channel is transparent in terms of speed and data type, meaning that any combination of SAN, WAN, voice and video services can be transmitted simultaneously over a single fiber or fiber pair.

Orient sfp CWDM fiber optic modules
AR CWDM optical fiber modules with all 18 CWDM wavelengths including CWDM SFP, CWDM SFP +, CWDM XFP and 3G SDI CWDM SFP are produced in Erionet. These CWDM fiber optic modules can be used in data transmission from 20 km to 120 km.

20-120km CWDM Modules

CWDM SFP 20KM
CWDM SFP+ 20KM
CWDM XFP 20KM

CWDM SFP 40KM
CWDM SFP+ 40KM
CWDM XFP 40KM
3G SDI CWDM SFP 40KM

CWDM SFP 80KM
CWDM SFP+ 80KM
CWDM XFP 80KM

CWDM SFP 120KM

CWDM XFP 120KM

CWDM Mux / Demux solutions

In addition to various CWDM / DWDM fiber optic modules, Everiont also provides a wide range of CWDM / DWDM Mux / Demux modules, which act as the main block in network expansion and upgrade. AR CWDM / DWDM Mux / Demux is available in different types in terms of type, number of channels and special ports.

Overview of DWDM channels according to the ITU standard

DWDM standard ITU G.694.1 is from 1528.77nm to 1563.86nm which is mostly in C band. DWDM can have wavelength spacing of 100GHz (0.8 nm) for 40 channels or 50GHz (0.4 nm) spacing for 80 channels. The full 100GHz DWDM wavelengths are shown below.

sfp DWDM fiber optic modules

sfp DWDM optical fiber modules are produced in Erionet with all 44 DWDM wavelengths including DWDM SFP, DWDM SFP +, DWDM XFP and adjustable DWDM receivers that support the transmission distance of up to 160 km. Tunable DWDM modules are capable of supporting a specific channel in a DWDM optical network and allow for remote wavelength changes in software.

40-160KM DWDM Modules

DWDM SFP 40KM
DWDM SFP+ 40KM
DWDM XFP 40KM

DWDM SFP 80KM
DWDM SFP+ 80KM
Tunable DWDM SFP+ 80KM
DWDM XFP 80KM
Tunable DWDM XFP 80KM

DWDM SFP 100KM

DWDM SFP 160KM

DWDM Mux / Demux Solutions

DWDM is used in long distance transmission networks to help reduce fiber loss and the cost of running new fiber. Each DWDM channel can transmit up to 100G, and by using optical amplifiers, the distance can be increased to more than 1000 km.