DWDM Multiplexer And Demultiplexer is A Wise Choice

July 23 , 2021
The emergence of big data requires efficient and capable data transmission speed. In order to solve the paradox of increasing bandwidth and spending less, multiplexers/demultiplexers are the best choice. This technology can transmit very large data traffic in the telecommunications network. This is a good way to deal with the bandwidth explosion from the network.

Wavelength division multiplexing

WDM (Wavelength Division Multiplexing) is wavelength division multiplexing. At the transmitting end, various light waves are multiplexed into a single signal and transmitted through optical fiber; at the receiving end, the optical signal is split into different light waves. WDM has two standards: Coarse Wavelength Division Multiplexing (CWDM) and Dense Wavelength Division Multiplexing (DWDM). The main difference between them is the wavelength between the channels. CWDM (coarse) channel spacing is 20nm, DWDM (dense) is 0.8nm. The following will introduce dense wavelength division multiplexing/demultiplexing.

Dense Wavelength Division Multiplexing Technology

DWDM technology can simultaneously integrate and send multiple signals in the same optical fiber in different wavelength forms. This technology meets the growing demand for high-efficiency data transmission while continuously increasing bandwidth, such as SONET/SDH. It uses different colors (wavelengths) and is combined in one device. This device is called multiplexing/demultiplexing, which is also the multiplexing and demultiplexing of optical signals.


MUX selects an input signal to send to the output. Therefore, the multiplexer is also called a data selector. The multiplexer acts as a multiple-input single-output switch. It sends high-speed optical signals through a single fiber-optic cable. The multiplexer allows multiple signals to share one device or resource without requiring one input signal to correspond to one device. The multiplexer is mainly used to increase data, and it can also send data under a certain time and bandwidth.

The demultiplexer is exactly the opposite way. A demultiplexer is a device with one input and multiple outputs. It is usually used to send a single input signal to many devices. The main function of an optical splitter is to receive an optical signal from multiple optical frequencies, and then separate it into their respective frequencies.

The current general configuration of DWDM multiplexing/demultiplexing ranges from 8 to 96 channels. Perhaps in the future, the number of channels can reach 200 or more. The transmission channel (wavelength) of the DWDM system is usually referred to as the spectrum of the conventional band or C-band, all channels in the 1550nm wavelength region. Dense channel spacing requires stricter wavelength control, so the requirement of cooling DWDM optical transceiver modules violates CWDM's uncooled optics with wider channel spacing, such as CWDM SFP XFP, CWDM.

The dense wavelength division multiplexing/demultiplexing module is a completely passive solution, compacting the wavelengths for long-distance transmission.
FiberWDM (Feisu.com) can provide 40ch DWDM MUX DEMUX, wavelengthfrom C21 to C60(1560.61nm~1529.55nnm), in accordance with the ITU-T G.694.1 100GHZ grid, it maximizes the capacity of the C-band range. The 40ch DWDM with 1310nm port is totally passive DWDM device, and support low insertion loss( wavelength ports < 3.5dB; 1310nm port < 0.8dB).And it conjunct with The DWDM amplifiers and DCM device, the 40ch DWDM transfer system can support a long distance transmission.

40 Channels DWDM MUX DEMUX and with 1310nm Port, supports 40 channels difference business in two optical fiber for point-to-point transmission. It works in Broadcast and TV, IDC, finance, government, cloud, massive data and other industries.
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