Which tool can be used to identify faults in a fiber optic cable?

The Visual Fault Locator (VFL) is specifically designed to identify faults in fiber optic cables by providing a visible light signal. This tool emits a bright red laser light that travels through the fiber, allowing technicians to visually trace the cable and detect breaks or other issues along its length. When the light is interrupted, or when there is a significant light loss at a splice or connector, it indicates a fault or failure in the cable.

While other tools like the Optical Loss Test Set (OLTS) and multimeters are valuable in their own contexts, they do not primarily serve the purpose of visually identifying faults in fiber optics in the same straightforward manner as the VFL. The OLTS is more focused on measuring optical power and loss in the fiber, while a multimeter is generally used for electrical measurements and does not apply to fiber optics as effectively. Thus, the VFL stands out as the most suitable option for identifying faults in fiber optic cables.