Wavelength of Huawei Switch Optical Module

Huawei switch optical modules typically operate at wavelengths of 850 nm, 1310 nm, 1550 nm, or specific CWDM/DWDM wavelengths depending on the module type.Common Wavelengths by Module TypeMultimode Modules (MMF): Usually operate at 850 nm for short-distance transmission, suitable for distances up to a few hundred meters. These modules are cost-effective and used for small-capacity, short-distance links .Single-Mode Modules (SMF): Operate at 1310 nm or 1550 nm, supporting long-distance transmission. The 1310 nm wavelength is typically used for medium-range links, while 1550 nm is used for long-range links, often up to 40 km or more, as in the Huawei 10GBASE-ER SFP+ module .Wavelength Division Multiplexing (WDM) Modules: Include CWDM (Coarse WDM) and DWDM (Dense WDM) modules. These modules transmit multiple signals on different center wavelengths over a single fiber. CWDM modules have wider channel spacing, while DWDM modules have narrower spacing and higher channel density, allowing more efficient use of fiber for long-distance transmission .Example: Huawei 10GBASE-ER SFP+ ModuleWavelength: 1550 nmFiber Type: Single-mode fiber (SMF)Transmission Distance: Up to 40 kmFeatures: Cooled EML laser, PIN photodiode with TIA, DDM support, and Class I laser safety compliance .Key ConsiderationsEnsure the optical module is certified by Huawei to guarantee reliability and service stability . Certified modules are labeled with "HUAWEI" and can be verified using commands like display transceiver.Do not mix single-mode and multimode modules or fibers, as this can cause transmission errors .For long-distance modules, check the receive power and use optical attenuators if the fiber length is shorter than the module's rated distance to prevent damage .In summary, Huawei switch optical modules cover a range of wavelengths depending on fiber type and transmission distance: 850 nm for multimode, 1310 nm and 1550 nm for single-mode, and specific CWDM/DWDM wavelengths for multiplexed long-distance links. Proper selection ensures optimal network performance and module longevity.