Standard ITU Grid Wavelengths


DWDM ITU channels consist of 100GHz (0.8 nm) wavelength spacing for 40 channels or 50GHz (0.4 nm) spacing for 80 channels. ITU G694.1 defines the standard DWDM wavelength range as 1528.77 to 1563.86nm. The complete channel grid for 100GHz DWDM is shown below.

 

ITU Channel Number Wavelength, nm Freq., THz
11 1568.11 191.1
12 1567.95 191.2
13 1567.13 191.3
14 1566.31 191.4
15 1565.50 191.5
16 1564.68 191.6
17 1563.86 191.7
18 1563.05 191.8
19 1562.23 191.9
20 1561.42 192.0
21 1560.61 192.1
22 1559.79 192.2
23 1558.98 192.3
24 1558.17 192.4
25 1557.36 192.5
26 1556.55 192.6
27 1555.75 192.7
28 1554.94 192.8
29 1554.13 192.9
30 1553.33 193.0
31 1552.52 193.1
32 1551.72 193.2
33 1550.92 193.3
34 1550.12 193.4
35 1549.32 193.5
36 1548.51 193.6

 

ITU Channel Number Wavelength, nm Freq., THz
37 1547.72 193.7
38 1546.92 193.8
39 1546.12 193.9
40 1545.32 194.0
41 1544.53 194.1
42 1543.73 194.2
43 1542.94 194.3
44 1542.14 194.4
45 1541.35 194.5
46 1540.56 194.6
47 1539.77 194.7
48 1538.98 194.8
49 1538.19 194 .9

50

 1537.4 195.0
51 1536.61 195.1
52 1535.82 195.2
53 1535.04 195.3
54 1534.25 195.4
55 1533.47 195.5
56 1532.68 195.6
57 1531.9 195.7
58 1531.12 195.8
59 1530.33 195.9
60 1529.55 196.0
61 1528.77 196.1