Wavelength Division Multiplexing is the technology to choose when you need alot of capacity
divided into several channels on a fiber. It comes in different varietys with different characteristics
WDM is actually frequency division multiplexing (FDM) but referencing the wavelength of light as opposed to the frequency of light. However, since wavelength and frequency have an inverse relationship (shorter wavelength means higher frequency), the WDM and FDM terms actually describe the same technology – light in optical cable used to carry data and communication signals.
In the list above each category you can find the type of WDM you seek. We have listed a lot of different criterias, which will help you end up with the product you are looking for.
There are two main flavours of wdm; Coarse Wavelength Division Multiplexing (CWDM) and Dense Wavelength Division Multiplexing (DWDM). They have different numbers of channels and workarea. We have a short introduction here for you, but if you need more information, don't hesitate to contact us.
CWDM is often employed in situations where only a few channels are needed and there is no need for distances longer than 70 km. The passive CWDM is an implementation of CWDM that uses no electrical power. It divides the wavelengths by passive optical components like thin film filters. CWDM Mux/Demux is the most commonly used device in passive CWDM system.
DWDM technology is used for long haul optical transmissions. It can be divided into two different versions: an active solution and a passive solution. The active solution is a good fit for applications involving more than 32 links over the same fiber. Passive DWDM solutions have fewer active elements, in other words, the solutions have higher reliability and less latency. In a passive DWDM network, the line functions only due to the use of optical transceiver. Passive DWDM systems allow to arrange a high speed system with high channel capacity, but the transmission distance and management are limited. The major applications of passive DWDM system are metro networks and high speed communication lines
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