Which factors contribute to a nonreflective OTDR trace signature?

A nonreflective OTDR (Optical Time Domain Reflectometer) trace signature is characterized by the absence of significant reflection points in the trace, resulting from specific components or phenomena. The correct choice highlights two primary factors: microbends and fiber break test (FBT) splitters, as well as fusion splices and connectors.

Microbends occur when the optical fiber is subjected to small bends, causing localized attenuation and scattering of light, but not significant reflection. Similarly, FBT splitters are designed to evenly split the incoming light into multiple output paths without generating substantial reflective artifacts in the OTDR trace. These elements contribute to a smooth trace with minimal reflective peaks.

On the other hand, fusion splices and connectors are also relevant in this context. Fusion splicing precisely fuses two fiber ends together, creating a low-loss joint that ideally minimizes reflections, while well-made connectors can also significantly reduce any reflective signature. These components contribute to a nonreflective behavior by ensuring that light transmission remains smooth and uninterrupted through the fiber.

Thus, by choosing the combined factors of microbends, FBT splitters, fusion splices, and connectors, one captures all the elements that help maintain a nonreflective signature in an OTDR trace,