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Difference Between DWDM vs.CWDM

<br><br>https://www.cbo-it.de/de/produkte/blueoptics/transceiver/sfpplus.html<br><br>DWDM is a shortening Dense Wavelength Division Multiplexing. DWDM as an optical transmission technology <br><br>has evolved after the previous SONET/SDH technology has reached its limitations in terms of ecosystem <br><br>components to achieve price competitive high data rates transmissions over the fibers. <br><br>

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Difference Between DWDM vs.CWDM

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  1. Difference Between DWDM vs. CWDM CREATED BY CBOGmbH

  2. What is DWDM DWDM is a shortening Dense Wavelength Division Multiplexing. DWDM as an optical transmission technology has evolved after the previous SONET/SDH technology has reached its limitations in terms of ecosystem components to achieve price competitive high data rates transmissions over the fibers.

  3. The Development of WDM

  4. WDM technology has changed the way that data streams are launched on the fiber. The development of optoelectronic components has allowed to transmit simultaneous parallel light waveguides on the fiber expanding the total bandwidth of a transmission system.

  5. DWDM - system components require higher precision in fabrication and operation thus making the overall price of the system higher than the CWDM - Coarse Wavelength Division Multiplexing which appeared later as an cheaper alternative for shorter distances and few lambdas to be transmitted.

  6. CWDM / DWDM - The Differences

  7. CWDM DWDM DWDM uses frequencies standardizations, the ITU-T G.694.1 frequency grid to address each channel transmitted over fiber, these frequencies are much more ‘dense’ and more tightly spaced than CWDM. CWDM uses lambdas to refer to its transmission guides and the ITU standardized a channel spacing grid for use with CWDM (ITU-T G.694.2).  Analyzing and comparing the signals on the fiber it may be observed the wider band signals of CWDM and larger spaces between lambdas having a greater tolerance to frequency shifting. In DWDM systems, narrow frequencies and tightly packed transmission on the line requires precision filters, cooled lasers and dispersion compensators.

  8. DWDM DWDM system can reach distances of thousands of kilometers with the combination of Erbium Doped Fibre Amplifier or Raman Amplifiers on single mode fibers. CWDM CWDM distances are up to tens of kilometers without the use of optical amplifiers that may be adequate for metro carriers who prefer to start small and expand later as demand increases.

  9. Summary

  10. CONTACT Us CBO GmbHFriedhofstr. 2545478 Muelheim an der Ruhr / Germany email: info@cbo-it.de Hotline:0049 - 208 - 777 247 - 0 https://www.cbo-it.de/de/produkte/blueoptics/transceiver/sfpplus.html

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