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  2. Optical time-domain reflectometer - Wikipedia

    en.wikipedia.org/wiki/Optical_time-domain...

    An optical time-domain reflectometer (OTDR) is an optoelectronic instrument used to characterize an optical fiber. It is the optical equivalent of an electronic time domain reflectometer which measures the impedance of the cable or transmission line under test.

  3. Time-domain reflectometer - Wikipedia

    en.wikipedia.org/wiki/Time-domain_reflectometer

    The equivalent device for optical fiber is an optical time-domain reflectometer. Time-domain transmissometry (TDT) is an analogous technique that measures the transmitted (rather than reflected) impulse. Together, they provide a powerful means of analysing electrical or optical transmission media such as coaxial cable and optical fiber.

  4. Signal reflection - Wikipedia

    en.wikipedia.org/wiki/Signal_reflection

    Time-domain reflectometer for electrical cable fault detection. Because damage to the cable can cause reflections, an instrument called an electrical time-domain reflectometer (ETDR; for electrical cables) or an optical time-domain reflectometer (OTDR; for optical cables) can be used to locate the damaged part of a cable. These instruments work ...

  5. Luna Introduces New Model of its Optical Backscatter ... - AOL

    www.aol.com/2012/11/19/luna-introduces-new-model...

    Luna Introduces New Model of its Optical Backscatter Reflectometer™ OBR 5T-50 model is 200 times faster than competing options for fiber-optic testing solutions ROANOKE, Va.--(BUSINESS WIRE ...

  6. Optical power meter - Wikipedia

    en.wikipedia.org/wiki/Optical_power_meter

    GR-198, Generic Requirements for Hand-Held Stabilized Light Sources, Optical Power Meters, Reflectance Meters, and Optical Loss Test Sets, discusses OLTS equipment in depth. Alternatively, an Optical Time Domain Reflectometer (OTDR) can measure optical link loss if its markers are set at the terminus points for which the fiber loss is desired ...

  7. Distributed acoustic sensing - Wikipedia

    en.wikipedia.org/wiki/Distributed_acoustic_sensing

    Phase-sensitive coherent optical time-domain reflectometry (Φ-OTDR) is a technique that can provide sufficient sensitivity and resolution for these distributed acoustic sensing systems. [2] Standard optical time-domain reflectometry techniques use light sources with coherence lengths, which are shorter than pulse lengths. This can yield a sum ...

  8. Distributed temperature sensing - Wikipedia

    en.wikipedia.org/wiki/Distributed_temperature...

    There are two basic principles of measurement for distributed sensing technology, OTDR (optical time-domain reflectometry) and OFDR (optical frequency-domain reflectometry). For distributed temperature sensing often a code correlation technology [ 2 ] [ 3 ] [ 4 ] is employed which carries elements from both principles.

  9. Reflectometry - Wikipedia

    en.wikipedia.org/wiki/Reflectometry

    One application is the use of a tympanometer (a specialised acoustic reflectometer) to diagnose medical conditions of the ear. [1] Ultrasonic reflectometry: A transducer generates acoustic waves at ultrasonic frequency which propagate until they reaches the interface between the propagation medium and the sample. The wave is partially reflected ...

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