Exfo LFD-202P Live Fiber Detector

The Exfo LFD-202P is a handheld live fiber detector that identifies signal presence in optical fibers without requiring disconnection or network disruption. Using non-intrusive macrobending detection, it enables technicians to verify live fiber status across single-mode and multimode installations while preserving signal integrity and fiber condition. The instrument displays relative core power, detects continuous and modulated signals, and operates across a broad spectral range with sensitivity to –40 dBm equivalent core power.

– Technical Specifications

• Signal Detection: Continuous signals or modulated at 270 Hz, 1 kHz, and 2 kHz
• Core Power Range: +14 dBm to –19 dBm with over-range indicators (HI >+15 dBm, LO <–40 dBm)
• Detector Sensitivity: –40 dBm equivalent core power (MDSP)
• Spectral Response: 800 nm to 1650 nm
• Fiber Slack Requirement: Minimum 1.9 cm (3/4 in) for detection
• Operating Temperature: –20 °C to 50 °C
• Storage Temperature: –40 °C to 70 °C
• Relative Humidity: 0% to 95% non-condensing
• Dimensions: 23.6 cm (H) × 3.0 cm (W) × 3.2 cm (D)
• Weight: 0.3 kg (0.6 lb)
• Power Source: 9 V alkaline battery with low battery indicator

– Key Features

• Interchangeable adapter heads for 250 μm, 900 μm, and 3 mm fibers
• Optional heads available for jacketed fiber, coated fiber, and ribbon fiber configurations
• Hands-free operation with lockable Hold button
• Field-grade handheld design for mobile technician deployment
• Dual-window detection architecture for single-mode fibers (8 μm to 10 μm core diameter)

– Typical Applications

• Live fiber verification in active telecommunications networks
• Signal presence confirmation during fiber termination and splicing
• Network maintenance and troubleshooting without service interruption
• Fiber route identification and tracing in multi-fiber installations

– Compatibility & Integration

The LFD-202P interfaces directly with singlemode and multimode fibers via interchangeable adapter heads, eliminating the need for external adapters or coupling modules. Standard inclusion of 250 μm, 900 μm, and 3 mm heads addresses common fiber geometries in deployed networks.