Luna Technologies, a division of Luna Innovations Inc., has launched the Optical Backscatter Reflectometer 4200, a portable ultrahigh-resolution device offering advanced inspection and diagnostic capabilities to manufacturers and installers of fiber optic assemblies and short networks. The company says it produces 1000 times higher resolution than an optical time-domain reflectometer and is highly sensitive. The device achieves 0.1-dB insertion loss resolution and can identify nonreflective failures. It operates at 1540 nm with single- and multimode capability, and it includes a customizable software interface. Applications include total fiber system quality control to ensure component performance and network uptime; insertion and return loss verification for fiber cables, connections, components and splices; and high-resolution fault location and failure analysis to determine bend, break, bad splice and bad connector points.