CWDM optical modules use CWDM technology, which can combine optical signals of different wavelengths through an external wavelength division multiplexer, and transmit them through a single fiber, thereby saving fiber resources. At the same time, the receiving end needs to use a wavelength division multiplexer to decompose the complex optical signal.
CWDM optical modules are usually used in CWDM systems, which are lower in cost than DWDM optical modules and are widely used. In a CWDM system, the CWDM optical module is inserted into the switch, and the CWDM optical module is connected to the CWDM demultiplexer or OADM optical add/drop multiplexer with jumpers.
The CWDM optical module played a huge role in the CWDM system and successfully solved the problems in the optical fiber transmission network. CWDM optical modules have 8 major advantages, which are summarized as follows:
1. "Transparent" transmission of data
2. Large capacity, making full use of the huge bandwidth resources of optical fiber
3. Greatly save fiber resources and reduce construction costs
4. High networking flexibility, economy and reliability
5. All-optical network switching can realize long-distance non-electric relay transmission
6. Simplified laser module, thereby reducing the size of the equipment and saving room space
7. Optical layer recovery is independent of business and speed, and can effectively protect data
8. No semiconductor cooler and temperature control function are needed, so the power consumption can be significantly reduced, which is only 12.5% of DWDM.
