Which of the following will NOT confirm fiber continuity over short distances?

A microscope is typically not a tool used for confirming fiber continuity over short distances in the context of testing fiber optic cables. Instead, a microscope is primarily used for examining the end faces of fiber optic connectors or the fiber itself for cleanliness, scratches, or other potential issues. While inspecting the fiber end faces can help identify problems that may affect the performance of the cable, it does not provide a direct measure of whether light is being transmitted through the fiber, which is essential for confirming continuity.

In contrast, tools such as an Optical Time Domain Reflectometer (OTDR) and an optical power meter are explicitly designed to measure signal continuity. The OTDR is capable of analyzing the entire length of the fiber, providing a comprehensive view of its integrity, including identifying faults and reflections along the fiber. An optical power meter, on the other hand, measures the light power at the output end of the fiber, confirming that light is properly transmitted through the fiber, thereby verifying continuity. A Visual Fault Locator works by sending a visible light signal through the fiber and allows for easy detection of breaks or excessive bends. Thus, while the microscope plays an important role in ensuring connection quality, it does not confirm fiber continuity.