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Benefits Of The CWDM System
Dec 12, 2018

The construction of the metropolitan area network is faced with a certain degree of tight fiber resources or expensive prices for leasing fiber. At present, a typical coarse wavelength division multiplexing system can provide 8 optical channels, and up to 18 optical channels can be achieved according to the ITU-T G.694.2 specification.

Another advantage of CWDM is its small size and low power consumption. The CWDM system's lasers do not require semiconductor chillers and temperature control functions, so power consumption can be significantly reduced. For example, a DWDM system consumes about 4W of power per laser, while a CWDM laser without a chiller consumes only 0.5W.

The simplified laser module in the CWDM system reduces the volume of the optical transceiver integrated module, and the simplification of the device structure also reduces the size of the device and saves room space. Compared with the traditional TDM method, CWDM has speed and protocol transparency, which makes it more suitable for the development of high-speed data services in the metropolitan area network. There are many different protocols and services at different rates in the metropolitan area network. CWDM provides transparent transmission channels with different rates on a single fiber, such as Ethernet, ATM, POS, SDH, etc., and CWDM is transparent. The sex and add/drop multiplexing functions allow the user to directly go up and down a certain wavelength without converting the original signal format. That is, the optical layer provides a transport structure that is independent of the business layer.

CWDM has great flexibility and scalability. For metro services, the flexibility of service provision, especially the speed of service provision and the ability to scale as the business grows, is very important.