Which is better for CWDM/DWDM wavelength division multiplexing equipment?

1. The use of CWDM/DWDM wavelength division multiplexing equipment

Due to the increasing demands on bandwidth, dense wavelength division multiplexing (DWDM) equipment has made great progress in reducing costs, so it is also more and more favored in the market. However, Coarse Wavelength Division Multiplexing (CWDM) still has a higher price advantage in scenarios where connection rates are lower than 10G and short-distance transmission. In low data rate network construction, it is still the most feasible device at present.

2. Hybrid transmission of CWDM/DWDM wavelength division multiplexing equipment

CWDM wavelength division multiplexing equipment and DWDM wavelength division multiplexing equipment each have their own advantages in the OTN network, because the advantage of CWDM wavelength division multiplexing equipment is that it can use a relatively low-cost distributed feedback laser that does not require cooling and is inexpensive. The passive filter, so the system of CWDM wavelength division multiplexing equipment is currently widely used in the system of DWDM wavelength division multiplexing equipment. Although the CWDM technology can be used in the DWDM system to use cheaper optical modules, due to the relatively large CWDM channel spacing, the number of wavelengths available to the system will be reduced, which also limits the transmission capacity of the system. To a certain extent, it still cannot keep up with the non-mixed DWDM wavelength division multiplexing equipment.

It can be seen from the above analysis that in the future, CWDM wavelength division multiplexing equipment and DWDM wavelength division multiplexing equipment will complement each other instead of replacing each other.