Optical Time-domain Reflectometer is the full name of OTDR. In fiber tester
fields, it is a very important and common optoelectronic instrument used for
certifying and characterizing the optical fibers. During its working process,
the optical time domain reflectmeter send a series of fiber optic pulses into
the fiber cable, the fiber signal light will be scattered back and reflected
back from points along the fibers. because of the fiberglass attribute, fiber
joint point or fiber break. The strength of the return pulses is measured and
integrated as a function of time, and is plotted as a function of fiber length.
By this way, the OTDR can detect the Fiber
Optic Cable length, fiber optic cable overall attenuation and locate the
break point. In the following text, we will introduce the two major function of
the optical time domain reflectmeter.
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