Wave Division Multiplexing: Dense WDM (DWDM)

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IBM Total Storage Proven

Dense WDM (DWDM)

Dense WDM (DWDM) combines up to 64 wavelengths onto a single fiber. DWDM technology uses an ITU standard 100GHz or 200GHz spacing between the wavelengths, arranged in several bands at ~1500-1600nm. With DWDM technology, the wavelengths are close together (compared to CWDM), meaning that transponders are generally more complex and expensive than CWDM. However, with dense WDM (DWDM), the advantage is a much higher density of wavelengths, and also longer distances, especially with MRV's low dispersion solution for the Fiber Driver-LD system.

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