Published by: Research & Development Department, Technologie Optic.ca Inc., June 2025
Dense Wavelength Division Multiplexing (DWDM) in the O-band (Original band) operates in the 1260–1360 nm wavelength range. This band is particularly useful for short-reach optical communication due to its low chromatic dispersion in standard single-mode fiber. The following table lists 80 channels based on the LAN-WDM grid with 200 GHz spacing, commonly used in high-speed data center interconnects and optical transceivers.
| Lane | Frequency (THz) | Wavelength (nm) |
|---|---|---|
| L-29 | 236.4 | 1268.13 |
| L-28 | 236.2 | 1269.20 |
| L-27 | 236.0 | 1270.27 |
| L-26 | 235.8 | 1271.34 |
| L-25 | 235.6 | 1272.42 |
| L-24 | 235.4 | 1273.50 |
| L-23 | 235.2 | 1274.58 |
| L-22 | 235.0 | 1275.66 |
| L-21 | 234.8 | 1276.75 |
| L-20 | 234.6 | 1277.89 |
| L-19 | 234.4 | 1278.98 |
| L-18 | 234.2 | 1280.07 |
| L-17 | 234.0 | 1281.16 |
| L-16 | 233.8 | 1282.26 |
| L-15 | 233.6 | 1283.36 |
| L-14 | 233.4 | 1284.46 |
| L-13 | 233.2 | 1285.56 |
| L-12 | 233.0 | 1286.66 |
| L-11 | 232.8 | 1287.77 |
| L-10 | 232.6 | 1288.88 |
| L-9 | 232.4 | 1290.00 |
| L-8 | 232.2 | 1291.11 |
| L-7 | 232.0 | 1292.23 |
| L-6 | 231.8 | 1293.35 |
| L-5 | 231.6 | 1294.46 |
| L-4 | 231.4 | 1295.56 |
| L-3 | 231.2 | 1296.68 |
| L-2 | 231.0 | 1297.80 |
| L-1 | 230.8 | 1298.93 |
| L0 | 230.6 | 1300.05 |
| L1 | 230.4 | 1301.18 |
| L2 | 230.2 | 1302.31 |
| L3 | 230.0 | 1303.45 |
| L4 | 229.8 | 1304.58 |
| L5 | 229.6 | 1305.72 |
| L6 | 229.4 | 1306.85 |
| L7 | 229.2 | 1308.00 |
| L8 | 229.0 | 1309.14 |
| L9 | 228.8 | 1310.28 |
| L10 | 228.6 | 1311.43 |
| L11 | 228.4 | 1312.58 |
| L12 | 228.2 | 1313.73 |
| L13 | 228.0 | 1314.88 |
| L14 | 227.8 | 1316.04 |
| L15 | 227.6 | 1317.19 |
| L16 | 227.4 | 1318.35 |
| L17 | 227.2 | 1319.51 |
| L18 | 227.0 | 1320.67 |
| L19 | 226.8 | 1321.84 |
| L20 | 226.6 | 1323.00 |
| L21 | 226.4 | 1324.17 |
| L22 | 226.2 | 1325.34 |
| L23 | 226.0 | 1326.52 |
| L24 | 225.8 | 1327.70 |
| L25 | 225.6 | 1328.88 |
| L26 | 225.4 | 1330.06 |
| L27 | 225.2 | 1331.25 |
| L28 | 225.0 | 1332.44 |
| L29 | 224.8 | 1333.63 |
| L30 | 224.6 | 1334.83 |
| L31 | 224.4 | 1336.03 |
| L32 | 224.2 | 1337.23 |
| L33 | 224.0 | 1338.44 |
| L34 | 223.8 | 1339.65 |
| L35 | 223.6 | 1340.86 |
| L36 | 223.4 | 1342.08 |
| L37 | 223.2 | 1343.30 |
| L38 | 223.0 | 1344.52 |
| L39 | 222.8 | 1345.75 |
| L40 | 222.6 | 1346.98 |
| L41 | 222.4 | 1348.21 |
| L42 | 222.2 | 1349.45 |
| L43 | 222.0 | 1350.69 |
| L44 | 221.8 | 1351.94 |
| L45 | 221.6 | 1353.19 |
| L46 | 221.4 | 1354.44 |
| L47 | 221.2 | 1355.70 |
| L48 | 221.0 | 1356.96 |
| L49 | 220.8 | 1358.23 |
| L50 | 220.6 | 1359.50 |
*The above table lists 80 channels based on the LAN-WDM grid with 200 GHz spacing (based on CW-WDM-MSA lane assignments technical specifications)