What is the difference between single -mode light module and multi -mode light module.olt gpon 56 ports manufacturer

1. Different wavelengths

The working wavelength of the single -mode light module is usually 1310nm and 1550nm;

The working wavelength of the multi -mode light module is 850nm;

2. Different transmission distance

The farthest transmission distance of the multi -mode light module does not exceed 2km, and the transmission distance of the single -mode light module is generally above 10km;

3. Different light sources

The multi-mode light module uses LED or VCSEL laser as a light source, and the single-mode light module is based on FD-LD laser or DFB-LD laser as a light source;

4. Different optical fiber

Multi -mode light module with multi -mode optical fiber, single -mode optical module with single -mode optical fiber;

5. Different application scenarios

The multi -mode light module can only be used for short -range transmission. For example, the longest transmission distance of the Gigabit multi -modal light module is 550m. It is suitable for internal interconnection of the data center. The single -mode light module is suitable for the mid -to -long -distance urban network transmission.