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What is CWDM (Coarse Wavelength Division Multiplexer)?

What is CWDM (Coarse Wavelength Division Multiplexer)?


CWDM (Coarse Wavelength Division Multiplexing) also known as sparse Wavelength Division Multiplexing system, is an economical and practical short-distance WDM transmission system. With the rapid growth of Internet IP data services, the demand for transmission line bandwidth continues to increase. Although DWDM wavelength division multiplexer technology is an effective way to solve line bandwidth expansion, CWDM technology has advantages over DWDM in terms of system cost, versatility, and maintainability. In the metropolitan area network application, it is more and more recognized by everyone and has been put into practical use. The bottleneck of network transmission bandwidth has gradually shifted to the metropolitan area network, and the construction of metropolitan area network has become a hot spot of current network construction. Due to the unique advantages of Coarse Wavelength Division Multiplexing (CWDM) technology, it has been paid more and more attention in the construction of metropolitan area networks.

Coarse Wavelength Division Multiplexing (CWDM) system can effectively save fiber resources and networking costs. It solves the two problems of fiber shortage and transparent transmission of multiple services. It is mainly used in the convergence and access layer of the metropolitan area network, and can construct the network and carry out business in a short time. Now CWDM has a large number of applications in metropolitan area network transmission.

The Application of CWDM Wavelength Division Multiplexer

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Coarse wavelength division multiplexer CWDM does not have high requirements for optical fiber systems, especially the early installation of fiber optic core projects. As long as the power of the system is surplus, it can quickly achieve multiplication and expansion without upgrading the original system.The original system can be upgraded without the need of adding fiber cores for major projects, which is very flexible.

Coarse wavelength division multiplexer CWDM can transmit 2 or more asynchronous signals in the same optical fiber, which is conducive to the compatibility of digital signals and analog signals, and can be flexibly taken out or added to channels in the middle of the line. The sharing of active equipment is increased, and low-cost upgrades can be achieved for the transmission of multiple signals and the addition of new services.

Optical path index of Coarse wavelength division multiplexer CWDM

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Central wavelength: 1470nm, 1490nm, 1510nm, 1530nm, 1550nm, 1570nm, 1590nm, 1610nm

Wavelength interval: 20nm

Optical passband width: +/- 6 nm

The temperature drift of the emission center wavelength: 0.08nm-0.1nm/°C

The transmitted light power of each wave: -5dBm~+3dBm

Received optical power per wave: -24dBm~-3dBm

Receiving sensitivity: <-32dBm

Unitekfiber is one of the manufacturers of optical passive components in optical components in China. The products produced by Unitekfiber include: optical fiber parts, optical cables, optical fiber jumpers, optical fiber wavelength division multiplexers, optical fiber distribution box, and optical fibers PLC splitter, optic transceiver, optical fiber terminal box, etc. If you need any help, feel free to contact us[email protected]

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