In what type of installation is wide wavelength division multiplexing (WWDM) used?

Wide Wavelength Division Multiplexing (WWDM) is primarily employed in Passive Optical Networks (PONs). This technology allows multiple wavelengths to be transmitted simultaneously over a single optical fiber, significantly increasing the amount of data that can be delivered to end-users without requiring multiple fiber strands.

In a Passive Optical Network, passive splitters are used to distribute the optical signals to multiple users without the need for powered devices at intermediate points, which can simplify the architecture and reduce costs. WWDM enhances this capability by utilizing different wavelengths, enabling higher bandwidth and more efficient use of the existing fiber infrastructure.

In contrast, other types of networks like Active Optical Networks (AONs) rely on powered devices that actively switch and direct signals, making WWDM less applicable in those contexts. Similarly, Hybrid and Integrated Optical Networks may combine various technologies and do not primarily focus on the passive, multiple wavelength distribution feature of WWDM. Thus, the choice of Passive Optical Networks is the most accurate for the use of wide wavelength division multiplexing.