Chapter 2 Otdr Introduction∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙15; Otdr Basic Knowledge Introduction∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙15 - Baudcom BD3000 User Manual

Chapter 2 OTDR Introduction
2.1 OTDR Basic Knowledge Introduction
OTDR is a precision optical measuring instrument of Rayleigh scattering and Finel
reflection transmission in fiber produced by laser backscatter principle is made, it is widely used
in optical fiber, optical cable installation, maintenance and repair, monitoring applications. It can
be used to measure the length, attenuation, quality and fault location of fiber optic cable.
The light in the optical fiber transmission, due to defects in doped fiber component
inhomogeneity or fiber link itself, the optical pulse propagating in fiber Rayleigh scattering
occurs, where a portion of the optical signal will be shot into the opposite direction along the
veins are scattered back, so it is called the Rayleigh backscattering, through the observation of
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