OTDR stands for optical time domain reflectometer

OTDR stands for optical time domain reflectometer, and can be an optoelectronic instrument that is employed to characterize specific optical fibers. This tool injects optical pulses in series into fibers for screening along with extracting lighting form that fiber that is reflected back again from points in that specific fiber where the refraction changes. The strength of return pulses are then measured in time and then plotted below a function of the fiber length.

An OTDR could be available with different fiber types or wavelengths Fiber Optic Cable, so that common applications could be matched. screening at extended wavelengths like 1550 mm or 1625 mm could be utilized to discover attenuation matters as opposed to splice and connector issues. The optical dynamic range of OTDR tools are limited by the optical pulse width, input sensitivity along with signal integration time and output powers. The optical pulse signal and integration time could be adjusted on these tools. extended laser pulses improve the range and attenuation measurement resolutions, but consider away from the distance resolutions. Short pulse lengths will assist the distance resolution of optical activities and may reduce the range of measurement or attenuation measurement.
The most commonly employed OTDR tools available provide leading technology with power meter functions in 1 unit. These tools are optimized for PON place to place screening within of FTTx architectures thanks to the actuality that many different wavelength configurations and options are available.
Many of these tools are created for PON troubleshooting with an optional port for screening at a normal 1625 mm incorporating a filter that gets rid of unwanted 1310, 1490 and 1550 mm signals that can impact the measurement. The in services tool troubleshooting features of optical fiber is not interfering with regular operations, and so are not noticed to interfere with CO's laser transmitters. These use away from band wavelengths as is stated for suggestion with the ITU-T L.41, which can be the Maintenance Wavelength on Fibers Carrying Signals.

June 10, 2011

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