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DWDM/CWDM Wavelength ITU Channels Guide

Updated on December 15, 2021
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10G DWDM/CWDM SFP+

DWDM (Dense Wavelength Division Multiplexing) and CWDM (Coarse Wavelength Division Multiplexing) enable carriers to deliver more services over their existing fiber infrastructure by combining multiple wavelengths on a single fiber. FS offers a line of DWDM/CWDM solutions and products that help alleviate your fiber exhaust in a reliable, cost-efficient way.

Jump to learn more about DWDM/CWDM wavelengths, optical transceivers and mux/demux products by clicking on the corresponding section:

Table of Contents

DWDM

DWDM 100GHz ITU Grid

DWDM 50GHz ITU Grid

40KM DWDM Modules

80KM DWDM Modules

100KM DWDM Modules

FS DWDM Mux/Demux

CWDM

CWDM ITU Grid

20KM CWDM Modules

40KM CWDM Modules

80KM CWDM Modules

120KM CWDM Modules

FS CWDM Mux/Demux

DWDM ITU Channels Overview

ITU G.694.1 standard DWDM region is from 1528.77 nm to 1563.86 nm that resides mostly within the C band. DWDM channel plan varies, but a typical DWDM system would use 40 channels at 100 GHz (0.8nm) spacing or 80 channels with 50 GHz (0.4nm) spacing. At present, DWDM systems based on 100 GHz DWDM C-Band typically adopt a DWDM channel plan with channels 17 through to 61. The complete channel grid for 100GHz DWDM and 50GHz DWDM is shown below.

DWDM 100GHz ITU Grid

Channel Frequency Wavelength Channel Frequency Wavelength
# GHz nm # GHz nm
1 190100 1577.03 37 193700 1547.72
2 190200 1576.2 38 193800 1546.92
3 190300 1575.37 39 193900 1546.12
4 190400 1574.54 40 194000 1545.32
5 190500 1573.71 41 194100 1544.53
6 190600 1572.89 42 194200 1543.73
7 190700 1572.06 43 194300 1542.94
8 190800 1571.24 44 194400 1542.14
9 190900 1570.42 45 194500 1541.35
10 191000 1569.59 46 194600 1540.56
11 191100 1568.11 47 194700 1539.77
12 191200 1567.95 48 194800 1538.98
13 191300 1567.13 49 194900 1538.19
14 191400 1566.31 50 195000 1537.4
15 191500 1565.5 51 195100 1536.61
16 191600 1564.68 52 195200 1535.82
17 191700 1563.86 53 195300 1535.04
18 191800 1563.05 54 195400 1534.25
19 191900 1562.23 55 195500 1533.47
20 192000 1561.41 56 195600 1532.68
21 192100 1560.61 57 195700 1531.9
22 192200 1559.79 58 195800 1531.12
23 192300 1558.98 59 195900 1530.33
24 192400 1558.17 60 196000 1529.55
25 192500 1557.36 61 196100 1528.77
26 192600 1556.55 62 196200 1527.99
27 192700 1555.75 63 196300 1527.22
28 192800 1554.94 64 196400 1526.44
29 192900 1554.13 65 196500 1525.66
30 193000 1553.33 66 196600 1524.89
31 193100 1552.52 67 196700 1524.11
32 193200 1551.72 68 196800 1523.34
33 193300 1550.92 69 196900 1522.56
34 193400 1550.12 70 197000 1521.79
35 193500 1549.32 71 197100 1521.02
36 193600 1548.51 72 197200 1520.25

DWDM 50GHz ITU Grid

Channel Frequency Wavelength Channel Frequency Wavelength
# GHz nm # GHz nm
1 190.1 1577.03 37 193.7 1547.72
1.5 190.15 1576.61 37.5 193.75 1547.32
2 190.2 1576.2 38 193.8 1546.92
2.5 190.25 1575.78 38.5 193.85 1546,52
3 190.3 1575.37 39 193.9 1546,12
3.5 190.35 1574.95 39.5 193.95 1545.72
4 190.4 1574.54 40 194 1545.32
4.5 190.45 1574.13 40.5 194.05 1544.92
5 190.5 1573.71 41 194.1 1544.53
5.5 190.55 1573.3 41.5 194.15 1544.13
6 190.6 1572.89 42 194.2 1543.73
6.5 190.65 1572.48 42.5 194.25 1543.33
7 190.7 1572.06 43 194.3 1542.94
7.5 190.75 1571.65 43.5 194.35 1542.54
8 190.8 1571.24 44 194.4 1542.14
8.5 190.85 1570.83 44.5 194.45 1541.75
9 190.9 1570.42 45 194.5 1541.35
9.5 190.95 1570.01 45.5 194.55 1540.95
10 191 1569.59 46 194.6 1540.56
10.5 191.05 1569.18 46.5 194.65 1540.16
11 191.1 1568.11 47 194.7 1539.77
11.5 191.15 1568.36 47.5 194.75 1539.37
12 191.2 1567.95 48 194.8 1538.98
12.5 191.25 1567.54 48.5 194.85 1538.58
13 191.3 1567.13 49 194.9 1538.19
13.5 191.35 1566.72 49.5 194.95 1537.79
14 191.4 1566.31 50 195 1537.4
14.5 191.45 1565.9 50.5 195.05 1537
15 191.5 1565.5 51 195.1 1536.61
15.5 191.55 1565.09 51.5 195.15 1536.22
16 191.6 1564.68 52 195.2 1535.82
16.5 191.65 1564.27 52.5 195.25 1535.43
17 191.7 1563.86 53 195.3 1535.04
17.5 191.75 1563.45 53.5 195.35 1534.64
18 191.8 1563.05 54 195.4 1534.25
18.5 191.85 1562.64 54.5 195.45 1533.86
19 191.9 1562.23 55 195.5 1533.47
19.5 191.95 1561.83 55.5 195.55 1533.07
20 192 1561.42 56 195.6 1532.68
20.5 192.05 1561.01 56.5 195.65 1532.29
21 192.1 1560.61 57 195.7 1531.9
21.5 192.15 1560.2 57.5 195.75 1531.51
22 192.2 1559.79 58 195.8 1531.12
22.5 192.25 1559.39 58.5 195.85 1530.72
23 192.3 1558.98 59 195.9 1530.33
23.5 192.35 1558.58 59.5 195.95 1529.94
24 192.4 1558.17 60 196 1529.55
24.5 192.45 1557.77 60.5 196.05 1529.16
25 192.5 1557.36 61 196.1 1528.77
25.5 192.55 1556.96 61.5 196.15 1528.38
26 192.6 1556.56 62 196.2 1527.99
26.5 192.65 1556.15 62.5 196.25 1527.6
27 192.7 1555.75 63 196.3 1527.22
27.5 192.75 1555.34 63.5 196.35 1526.83
28 192.8 1554.94 64 196.4 1526.44
28.5 192.85 1554.54 64.5 196.45 1526.05
29 192.9 1554.13 65 196.5 1525.66
29.5 192.95 1553.73 65.5 196.55 1525.27
30 193 1553.33 66 196.6 1524.89
30.5 193.05 1552.93 66.5 196.65 1524.5
31 193.1 1552.52 67 196.7 1524.11
31.5 193.15 1552.12 67.5 196.75 1523.72
32 193.2 1551.72 68 196.8 1523.34
32.5 193.25 1551.32 68.5 196.85 1522.95
33 193.3 1550.92 69 196.9 1522.56
33.5 193.35 1550.52 69.5 196.95 1522.18
34 193.4 1550.12 70 197 1521.79
34.5 193.45 1549.72 70.5 197.05 1521.4
35 193.5 1549.32 71 197.1 1521.02
35.5 193.55 1548.91 71.5 197.15 1520.63
36 193.6 1548.52 72 197.2 1520.25
36.5 193.65 1548.11 72.5 197.25 1519.86

FS DWDM Transceiver Modules Quick View

FS DWDM transceivers are available with C17-C61 100GHz DWDM wavelengths, and C17-C61 50Ghz DWDM wavelengths, including DWDM SFP, DWDM SFP+, DWDM XFP, and Tunable DWDM transceivers that support transmission distance up to 100km. Tunable DWDM transceivers are able to support a specific channel in a DWDM optical network, allowing for remotely wavelengths change in software.

40KM DWDM Modules

DWDM SFP 40KM, 100 Ghz

DWDM SFP+ 40KM, 100 GHz

DWDM XFP 40KM, 100 GHz

80KM DWDM Modules

DWDM SFP 80KM, 100 GHz

DWDM SFP+ 80KM, 100 Ghz

Tunable DWDM SFP+ 80KM, 50 Ghz

DWDM XFP 80KM, 100 GHz

Tunable DWDM XFP 80KM, 50 Ghz

100KM DWDM Modules

DWDM SFP 100KM

FS DWDM Mux/Demux

DWDM Mux/Demux is made to multiplex and demultiplex multiple DWDM channels into one or two fibers. It can extend the bandwidth of optical communication network with low cost and long transmission distance up to 1000 kilometers, which makes it an ideal long-haul network solution. FS offers DWDM Mux/Demux in different channal numbers and single or dual fiber types.

Product Description Line Type Wavelength Channel Spacing (GHz)
8CH DWDM Mux/Demux Dual Fiber C21-C28, C53-C60 100
Single Fiber C21-C35, C22-C36 100
16CH DWDM Mux/Demux Dual Fiber C17-C32, C21-C36, C27-C42, C43-C58 100
40CH DWDM Mux/Demux Dual Fiber C21-C60 100
96CH DWDM Mux/Demux Dual Fiber C15-C62.5 50

Mux Demux and OADM

CWDM ITU Channels Overview

ITU-T G.694.2 defines 18 wavelengths for CWDM transport ranging from 1270 to 1610 nm, spaced at 20 nm apart. The complete CWDM ITU grid is shown below. Each CWDM channel is transparent to the speed and type of data, meaning that any mix of SAN, WAN, voice and video services can be transported simultaneously over a single fiber or fiber pair.

CWDM Channels
ITU Channel No. Wavelength (nm) Latch color by wavelength
27 1270
29 1290
31 1310
33 1330
35 1350
37 1370
39 1390
41 1410
43 1430
45 1450
47 1470
49 1490
51 1510
53 1530
55 1550
57 1570
59 1590
61 1610

FS CWDM Transceiver Modules Quick View

FS CWDM transceivers are available with all 18 CWDM wavelengths, including CWDM SFP, CWDM SFP+, CWDM XFP and 3G SDI CWDM SFP modules. These CWDM transceivers can be applied in data transmission spanning 20 km to 120 km.

20KM CWDM Modules

CWDM SFP 20KM

CWDM SFP+ 20KM

CWDM XFP 20KM

40KM CWDM Modules

CWDM SFP 40KM

CWDM SFP+ 40KM

CWDM XFP 40KM

3G SDI CWDM SFP 40KM

80KM CWDM Modules

CWDM SFP 80KM

CWDM SFP+ 80KM

CWDM XFP 80KM

120KM CWDM Modules

CWDM SFP 120KM

FS CWDM Mux/Demux

In addition to the various CWDM transceivers, FS also provides a wide range of CWDM Mux/Demux, which acts as the major building block in network expansion and upgrade. FS CWDM Mux/Demux comes in several different types in regard to line type, channel number, and special port.

Product Description Line Type Wavelength
4CH CWDM Mux/Demux Dual Fiber 1270-1330nm, 1510-1570nm
Single Fiber 1470-1590nm, 1490-1610nm
8CH CWDM Mux/Demux Dual Fiber 1290-1430nm, 1430-1570nm, 1470-1610nm, 1270-1450nm (Skip 1390, 1410nm)
9CH CWDM Mux/Demux Single Fiber 1270-1590nm, 1270-1610nm, 1290-1610nm
18CH CWDM Mux/Demux Dual Fiber 1270-1610nm

Mux Demux and OADM

Related Articles:

CWDM (Coarse Wavelength Division Multiplexing)

DWDM (Dense Wavelength Division Multiplexing)

CWDM vs DWDM

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