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Coarse wavelength division multiplexing (CWDM) technology, specially designed for long-and medium-distance network applications, has a high ratio of performance to price, and has been used in many fields. Coarse wavelength division multiplexing (CWDM) network is a passive network, which supports almost all protocol transmissions. Although coarse wavelength division multiplexing CWDM network is not as good as dense wavelength division multiplexing DWDM network in terms of data capacity, it can still be used in metropolitan area networks and other applications. The application of 10G coarse wavelength division multiplexing CWDM network will be introduced in this paper.

Why use 10G coarse wavelength division multiplexing CWDM network?

Although 40G and 100G networks are developing rapidly, they still need to be developed on the basis of 10G networks. Due to the high cost of 40G and 100G networks, 10G network is still the most commonly used network at present. 10G coarse wavelength division multiplexing CWDM network has the following two main advantages:

1. Easy to upgrade

10G networks are more common, and the connection between devices is easier. On the basis of 10G network, it is easy to upgrade from 10G network to 40G and 100G network. If operators want to upgrade their 10G networks to 40G or 100G, there are a variety of fiber optic devices on the market that can achieve this conversion.

two。 Low cost

Low-cost 10G hardware makes the use of 10G coarse wavelength division multiplexing CWDM network more economical and affordable.

Coarse wavelength Division Multiplexing CWDM Network structure

Wavelength division ring point-to-point network is two common coarse wavelength division multiplexing CWDM network structures, which are introduced as follows:

Wavelength division loop network

Coarse wavelength division multiplexing CWDM ring link is mainly used for the interconnection of local area network and storage area network. As shown in the figure above, four buildings are connected by multiple 8-channel CWDM multiplexers / demultiplexers.

Peer-to-peer network

Point-to-point coarse wavelength division multiplexing CWDM network is the simplest network structure in coarse wavelength division multiplexing CWDM network, and it is also the basis of other complex networks. By adding other devices, such as CWDM OADM coarse wave optical add-drop multiplexer, point-to-point coarse wavelength division multiplexing CWDM network can easily become a more complex network. The figure above shows a point-to-point coarse wavelength division multiplexed CWDM network using an 8-channel CWDM multiplexer / demultiplexer.

Application in 10G coarse wavelength Division Multiplexing CWDM Network

10G coarse wavelength division multiplexing CWDM network can be used in different fields. The following two applications are taken as examples to analyze their applications.

With the expansion of the scale of many campuses, the bandwidth demand of inter-campus networks is also increasing. The campus, school teaching and students' Internet access of the new campus all need higher bandwidth, so the construction of the new campus network undoubtedly requires a lot of investment. So how to make full use of the existing optical fiber to reduce the construction cost is particularly important. The picture above provides us with a good solution. As shown in the following figure, using four 8-channel CWDM multiplexers / demultiplexers with expansion ports can double the capacity of existing fiber without the need to install or lease additional fiber, thereby reducing cost and labor.

The coarse wavelength division multiplexing CWDM above uses different wavelengths to transmit different signals over a single optical fiber, which helps suppliers to make better use of existing optical infrastructure. As shown in the following figure, two Cisco switches are connected by four 8-channel CWDM multiplexers / demultiplexers. The signal is multiplexed and then transmitted over two optical cables.

With the development of wavelength division multiplexing WDM technology and market, the cost of building coarse wavelength division multiplexing CWDM network will be lower. The pace of easy Optical Communication (ETU-LINK) has never stopped, has been committed to providing users with the highest quality services and high-quality and low-cost coarse wavelength division multiplexing CWDM network and fine wavelength division multiplexing DWDM network construction equipment.

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