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OBR 4600 Reflectometer
Sep 2010
Luna TechnologiesRequest Info
ROANOKE, Va., Sept, 17, 2010 — Luna Technologies, a division of Luna Innovations Inc., has launched the latest addition to its optical backscatter reflectometer product line, the OBR 4600. The instrument provides advanced diagnostic and inspection capabilities to fiber optic manufacturers, developers and installers by offering ultrahigh-resolution, high-sensitivity measurements of optical fiber assemblies and networks up to 2 km long. It offers a substantial increase in measurement speed over its predecessor as well as a new "spot scan" option that enables the user to measure only a specific area of interest on the fiber.

Optical fiber networks and fiber-coupled assemblies are used in applications ranging from telecommunications and commercial and military avionics to medical catheters with integrated fiber optic tools.

The OBR 4600 offers the ability to look inside these networks and assemblies with a combination of spatial resolution, sensitivity and distance range that the company says is not possible with instruments such as optical time domain reflectometers. It can troubleshoot, inspect and locate faults point by point in an assembly and characterize the return and insertion losses of each interface individually. The user can easily measure and distinguish between a loss at a coupler, a splice, a bend or a connector.

Measurements can be taken more than twice as fast in the normal mode of operation and more than ten times faster in the new fast scanning mode. With this capability, 30 m of fiber can be measured with 10-µm spatial resolution in <7 s. With the spot scan option, users can troubleshoot and continuously measure 1- to 2-m segments of fiber at repetition rates of up to 3 Hz.

The device also provides a tool for fully distributed sensing using standard optical fiber as the sensor. With its precise measurement of the Rayleigh scatter reflected from the fiber, it can determine the strain or temperature changes along the length of the fiber at any point up to 70 m long, with a spatial resolution of a few millimeters.

The instrument locates, identifies and troubleshoots macrobends, couplers, splices, connectors and breaks, and locates insertion loss points at every point in the network or assembly, eliminating cut-back. It automates pass/fail verification of fiber assemblies, and monitors distributed temperature and strain profiles along a network or fiber, or inside a component or module.

Applications include load testing, structural health monitoring, detection of structural defects in composites and distributed thermal monitoring.


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Hardware installed on fiber cable ends to provide cable attachment to a transmitter, receiver or other cable. Usually a device that can be connected and disconnected repeatedly.  
1. In color development, the chemical that combines with certain by-products of the development procedure to form a dye. 2. Device for distributing optical power among two or more ports. 3. Device for coupling optical power between a waveguide and a source or detector, and thus sometimes interchangeable with a connector.
insertion loss
The total optical power loss caused by the insertion of an optical component such as a connector, splice or coupler into a fiber optic system. See attenuation.
An instrument for measuring reflectance.
A permanent joint whose purpose is to couple optical power among two or more ports. Also, a device whose purpose is to couple optical power between a waveguide and a source or detector.
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