Optical Time Domain Reflectometry
Title OTDR & Fiber Characterization
Article REF: E7120 V3
Optical Time Domain Reflectometry
Title OTDR & Fiber Characterization

Author : André CHAMPAVÈRE

Publication date: October 10, 2018 | Lire en français

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2. Optical Time Domain Reflectometry

2.1 Optical distance measurement

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2.1.1 A reminder of propagation in optical fibers

An optical pulse propagates in the dielectric waveguide that is the optical fiber at a speed known as the group velocityv g (in m · s –1 ) equal to the speed of light in a vacuum c 0 divided by the fiber's group index n g :

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