The EXFO LFD-300B FiberFinder is a handheld live fiber identifier and tone generator designed to pinpoint active optical fibers and locate dark fibers without disconnecting or disrupting network traffic. This triple-function instrument detects live fiber signals, identifies traffic direction, and recognizes audio tones for dark fiber location—all using non-destructive macrobend detection that induces less than 1 dB loss on most single-mode telecom fibers.
Technical Specifications
• Test Functions: Fiber continuity, fiber identification, optical power measurement
• Tone Recognition: 270 Hz, 1 kHz, 2 kHz for dark fiber location
• Tone Modulation: Detector/Generator modes
• Induced Loss: ≤ 1 dB (most single-mode telecom fibers and jacket types)
• Bending Detection: Non-destructive macrobend technique; fiber automatically released when no signal detected
• Detection Speed: Test cycle <6 s; startup ~20 seconds
• Power Source: 4 AA batteries per unit
• Light Sensitivity: Reduced ambient light sensitivity; protective cap included
– Key Features
• Live Fiber Detection: In-line, non-intrusive power estimation without signal disruption
• Traffic Analysis: Detects active signals and identifies traffic direction
• Auto-Optimization: Bending angle automatically optimized for fiber type and wavelength
• Safe for Long-Haul: Suitable for long-haul applications and high-payload fibers
• Fiber Clamping: Direct clamp-on design; no disconnection required
– Compatibility & Integration
Supported Fiber Types:
• Single-mode 9/125 µm (OS1, OS2) per ITU-T G.652
• Multimode 50/125 µm (OM2, OM3, OM4) per ITU-T G.651.1
• Multimode 62.5/125 µm (OM1) per IEC60793-2-10
• All wavelengths across supported fiber types
Jacket Optimization:
• 900 µm, 1.6 mm, 3 mm jacketed fibers (single headpiece for all)
Tone Generator Pairing: Combines with EXFO TG-300B Tone Generator for non-intrusive signal injection; typical signature adds 0.25 dB to live signals, detectable within seconds.
