Immediate verification of optical performance is crucial. Key "fiber optic testing tools" include:

• Visual Fault Locators (VFLs): A handheld tool that injects a visible laser light into the fiber. It quickly identifies breaks, macro-bends, or faulty splices by making the light visible at the fault location.

• Optical Loss Test Sets (OLTS) / Power Meters & Light Sources: Used in combination to measure the optical attenuation (signal loss) of the OPGW span. This confirms that the signal strength meets specifications and indicates no significant damage occurred during installation.

• Optical Time Domain Reflectometers (OTDRs): A sophisticated tool that provides a graphical trace of the fiber link, pinpointing the exact location and nature of any faults, splices, or connectors within the OPGW. It's essential for comprehensive post-installation analysis.

These tools allow for quick and accurate assessment of the OPGW's optical health, enabling immediate corrective action if needed.