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An Optical Time Domain Reflectometer (OTDR) is a precision instrument used to locate events or faults along a fiber link, typically within an optical communications network. Distances are typically measured in kilometers and resolution is measured in cm.

Luna’s Optical Backscatter Reflectometer™ (OBR) is a precision optical reflectometer designed to analyze passive fiber optic components and photonic integrated circuits. It delivers unprecedented inspection and diagnostic capabilities for the fiber optics industry. Luna’s state-of-the-art OBR provides isolation of faults and problems well before final test, saving hours in rework and hard dollars in yield loss. Industry-leading 10 micron spatial resolution with zero dead-zone.


Model Mfg Type Wavelength Dead-Zone Resolution
AQ1000 Yokogawa OTDR 1310 ±20/1550 ±20 ≤ 0.8m (event) min. 5 cm
AQ7280 Yokogawa OTDR 1310 ±20/1550 ±20 ≤ 0.8m (event) min. 5 cm
AQ7277B-B01 Yokogawa Remote OTDR 1650 ±5 nm*1 1650 ±10 nm*2 0.6 m (typ.) 0.7 m (event) min. 2 cm
OBR 5T-50 Luna OBR 1546.69nm (+/-20nm) 20μm 20μm
OBR 4600 Luna OBR 1525 -1610nm No dead-zone 10 μm
OBR 4613 Luna OBR 1270-1340nm No dead-zone 10 μm
OBR 4200 Luna Portable OBR 1542 ± 2nm No dead-zone 0.3 mm