A wavelength-isolating power meter is most commonly used in which type of installation?

A wavelength-isolating power meter is particularly suited for point-to-multipoint FTTx (Fiber to the x) installations due to the need for accurate measurement of multiple wavelengths used in such systems. In a point-to-multipoint setup, several subscribers are connected to a single source, typically through a passive optical network. This requires precise monitoring of the power levels for different wavelengths being sent to ensuring proper functioning and to avoid unintended interference or signal degradation.

The ability to isolate specific wavelengths allows technicians to verify that the expected power levels are achieved at each point in the network. Each wavelength may correspond to different services or users, making it imperative to monitor them separately to ensure optimal performance and troubleshoot any issues that arise. This is a key benefit of using a wavelength-isolating power meter in complex installations like point-to-multipoint FTTx systems.

Other installation types, like point-to-point, site-to-site, and residential home installations, may not present the same level of complexity or need for isolating different wavelengths, making this particular tool less critical in those scenarios.