The biggest advantage of CWDM systems is the low cost, and the device cost is mainly reflected in filters and lasers.
The wide wavelength spacing of 20 nm also gives CWDM the advantage of low specification of the laser and simplified structure of the optical multiplexer/demultiplexer. The structure is simplified, the yield is improved, and the cost is lowered. The cost increase of DWDM is mainly due to the high cost of laser diodes and the cooling laser technology used to maintain wavelength stability.
What is the CCWDM?
CCWDM is a mini-wavelength division multiplexer and is a mini version of CWDM. A wavelength division multiplexing technology based on TFF (Thin Film Filter), which works in the same way as CWDM.
The difference is that CCWDM uses free space technology, and its package size is greatly reduced compared with CWDM modules, and insertion loss. Lower and more consistent. It can replace CWDM products in telecommunications, enterprise networks, PON networks, TV and other fields.
We should choose the right WDM according to our transmission needs.
