The EXFO LFD-202 Live Fiber Detector is a handheld instrument for non-destructive detection of optical signals on active fibers without disconnection. Using a safe macrobending technique, it identifies traffic presence and direction, performs continuity testing, and verifies cable integrity while preserving network uptime and fiber integrity.
Technical Specifications
The LFD-202 operates across a spectral range of 800 nm to 1650 nm with insertion loss below 0.6 dB at 1310 nm. Power measurement spans 0 to -40 dBm, with the LFD-202E model extending to 23 to -50 dBm. Mean detectable signal power for singlemode fiber at 1310 nm reaches -40 dBm. Minimum detector sensitivity for bare ribbon fiber is -40 dBm at 1310 nm and -50 dBm at 1550 nm.
The device detects continuous and modulated signals, with optical tone receiver frequencies of 270 Hz, 1 kHz, and 2 kHz. Fiber compatibility includes singlemode (8 µm to 10 µm core diameter), dual window singlemode, multimode, and ribbon fiber. Detection requires minimum fiber slack of 1.9 cm (3/4 in) or 1.2 cm (1/2 in) depending on fiber type.
Interchangeable fiber heads support 3 mm, 900 µm, and 250 µm/ribbon configurations, with optional 2 mm and 1.6 mm heads available. Dedicated heads exist for jacketed fiber, coated fiber, and both bare and jacketed ribbon fiber. The device operates on a standard 9 V alkaline battery with approximately 5000 readings per charge.
– Key Features
• Non-disruptive macrobending detection preserves traffic flow and prevents fiber stress
• Simple one-button operation with hands-free Hold function
• Core power display for accurate signal measurement
• Over-range indicator for out-of-specification signals
• Compact form factor: 236 mm × 30 mm × 32 mm, weighing 0.3 kg
– Typical Applications
Fiber identification, continuity verification, fault detection, network maintenance, and emergency restoration tasks.
– Compatibility & Integration
Operates from -20 °C to 50 °C with storage capability to -40 °C to 70 °C. Humidity tolerance: 0 % to 95 % non-condensing (0 % to 90 % at 35 °C).
