Optical Fiber Identifiers An optical fiber identifier is a non-intrusive testing tool used in fiber optic networks to detect the presence of live signals without disconnecting or disrupting the service. It helps technicians identify specific fibers carrying traffic, verify signal direction, and detect modulation tones. This handheld device clamps onto a fiber and uses macro-bending technology to sense light transmission, making it a critical instrument for maintenance, troubleshooting, and installation in live networks. Its user-friendly design and real-time results enhance efficiency and accuracy during field operations. An OFI is an important tool for field technicians – assuring that live fibers are not disconnected and providing the ability to trace fibers from end to end. OFIs are simply clamped onto a fiber, where they induce a safe macro-bend and allow a small amount of light to escape. Units use this light to detect the presence of network traffic, test tones or CW signals and indicate the direction of the signal.
