High-Precision Localization of Reflection and Loss Results

Based on the OFDR principle, the high-precision reflectometers of the OBR series offer you the greatest spatial resolution achieved worldwide in a compact, portable unit. You can use the device to localize and measure reflection and loss results with maximum precision. As there are no dead zones, the measuring range starts right at the device plug-in connector. This makes the OBR ideal for accurate troubleshooting and fault analysis on plug-in connectors, components, cassettes and short-range networks of up to 2 km.

The systems in the OBR family allow you to illustrate all the parameters both spatially and as a function of wavelength. With an additional piece of software, you can also use the system as a sensor system for temperature (T) and strain (ε) (see Fiber-Optic Sensor Technology)


  • Measurement parameters: Return loss (RL), insertion loss (IL), group delay (DG)
  • Extremely high spatial resolution for reflection events: up to 30 m: 10 µm up to 2 km: 3 mm
  • Very high sensitivity: –130 dB
  • Very large dynamics: 70 dB
  • No dead zone


ModelsOBR 4200OBR 4600OBR 5T-50

Data sheet

OBR 4200

OBR 4600OBR 5T-50

Wavelength range

1542 nm1270–1335 nm or 1525–1610 nm1547 nm

Max. measuring range

500 m2 km8,5 m

Spatial resolution

3 mm across 500 m10 µm across 30 m
20 µm across 70 m
1 mm across 2 km (optional)
20 µm across 8,5 m

Measurement parameters

IL, RLIL,RL, GD, (T, e: optional)IL, RL

Spectral information


Area of application


Software Packages 

Desktop analysis software: Convenient data evaluation on a separate PC, regardless of the measuring device

Your PolyXpert in Fiber-Optic Measurement