The “dense” here means that the wavelength channels are very close to each other. It’s applied in fiber optical transceiver(so DWDM XFP, DWDM tunable SFP+ and so on appear) to increase bandwidth over existing fiber optic backbones, and is with each signal simultaneously carried on its own separate light wavelength. Then in this post, an introduction to DWDM will be made in detail.ĭWDM, short for Dense Wavelength Division Multiplexing, is a technology that gather datum from different sources on an optical fiber. To deal with the issue, the DWDM tech comes into optical interconnect markets. However, this transmission method does not make full use of optical fibers with large capacity as transmission medium, resulting in a great waste. Both of transmission networks use a single wavelength signal for data transmission. When capacity expansion takes place in traditional network transmission, Time Division Multiplexer(TDM) and Space Division Multiplexer(SDM) are adopted. An Overview of DWDM: Definition, Advantages and Applications
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