Huawei optical modules operate across standard wavelengths of 850 nm, 1310 nm, 1550 nm, supervisory wavelengths from 1310 nm to 1611 nm, and advanced coherent DWDM wavelengths spanning the Super C-band and Super L-band.

Standard Optical Modules

Huawei's commonly used optical modules have center wavelengths of 850 nm, 1310 nm, and 1550 nm. These correspond to short- and long-wavelength windows optimized for fiber transmission: 850 nm for short-range multimode fiber, 1310 nm for intermediate distances, and 1550 nm for long-distance single-mode fiber due to lower fiber loss at higher wavelengths .

Supervisory and OTDR Modules

Optical supervisory channels (OSC) and OTDR modules use specific wavelengths for monitoring and testing. Common supervisory wavelengths include 1310 nm, 1491 nm, 1506 nm, 1511 nm, 1514 nm, and 1611 nm. OSC modules may use 1310 nm and 1611 nm, while OSC with OTDR modules often operate at 1491 nm and 1511 nm for line quality detection .

Wavelength Division Multiplexing (WDM) Modules

Huawei's CWDM and DWDM modules transmit multiple wavelengths on a single fiber. CWDM typically uses fewer, widely spaced wavelengths, while DWDM supports dense channels with precise center wavelengths across the C-band (1530–1565 nm) and L-band (1565–1625 nm). These modules allow simultaneous transmission of multiple signals without interference, enabling long-distance and high-capacity networks .

Advanced Coherent Optical Modules

Huawei's latest coherent DWDM modules support high-capacity single-wavelength transmission, including 2 Tbps per wavelength, and operate across the Super C-band and Super L-band. These modules are designed for metro, DCI, and submarine cable applications, providing flexible multi-rate operation (800G, 1.2T, 1.6T, 2T) and extended reach through advanced DSP and modulation techniques .

Summary

• Standard modules: 850 nm, 1310 nm, 1550 nm
• Supervisory/OTDR modules: 1310 nm, 1491–1514 nm, 1611 nm
• CWDM/DWDM modules: Multiple wavelengths in C-band (1530–1565 nm) and L-band (1565–1625 nm)
• Advanced coherent modules: Super C-band and Super L-band, supporting up to 2 Tbps per wavelength These wavelength ranges allow Huawei optical modules to cover short-range, long-range, monitoring, and high-capacity coherent transmission scenarios efficiently.