Fluke OFTM-5630 OptiFiber SM Fiber OTDR

The Fluke OFTM-5630 OptiFiber is a single-mode fiber Optical Time Domain Reflectometer (OTDR) module engineered for precise testing, diagnostics, and certification of single-mode fiber optic links. Operating at 1310 nm ±20 nm and 1550 nm ±20 nm, this module integrates into the OptiFiber® Certifying OTDR mainframe (OF-500) to deliver field-proven event detection and attenuation measurement across distances up to 10 km. The OFTM-5630 pinpoints reflectance events, splices, bends, and connectors with distance accuracy of ±2 m, making it essential for rapid fault isolation in production and maintenance workflows.

Technical Specifications

• Fiber Type: Single-mode (9/125 µm)


• Operating Wavelengths: 1310 nm ±20 nm, 1550 nm ±20 nm


• Maximum Distance Range: 10 km


• Distance Accuracy: ±2 m


• Event Dead Zone: 1.5 m typical, 2 m maximum


• Attenuation Dead Zone: 10.5 m typical, 15 m maximum


• Dynamic Range: 1310 nm >11 dB, >12 dB; 1550 nm >9 dB, >10 dB


• Pulse Widths: 8 ns, 40 ns, 100 ns, 250 ns


• Power Measurement Range: 0 to -60 dBm


• Connector Backreflection (Singlemode): <-50 dB


• Connector Type: SC/UPC (laser-hardened)


• Battery Type: Li-Ion, 8-hour runtime


• Operating Temperature: 0°C to 40°C


• Non-Operating Temperature: -20°C to 60°C


• Relative Humidity: Up to 95% RH (operating, without condensation)


• Weight: 4.5 lbs (1.9 kg) with mainframe and battery

Key Features

• EventMap™ analysis calculates loss and reflectance, identifying discrete events


• Auto OTDR function automatically selects optimal settings


• SmartLoop™ Technology enables automated two-fiber testing in single pass


• SC/UPC laser-hardened connector prevents core damage from high-power signals

Typical Applications

• Single-mode fiber link certification and acceptance testing


• Field troubleshooting and event localization


• Splice loss and connector reflectance measurement


• Network maintenance and network acceptance procedures

Compatibility & Integration Operates with the OptiFiber® Certifying OTDR Mainframe (OF-500). Connects via USB and RS-232 for data transfer. Compatible with LinkWare™ PC software for professional test reporting. Supports FiberInspector™ probes, launch cables, power meters, and mandrels.