Simultaneous bi-directional optical time domain reflectometry method
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United States of America Patent
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Jun 13, 1989
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N/A
app pub date -
Apr 12, 1988
filing date -
Apr 12, 1988
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Expired
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Abstract
A simultaneous bi-directional OTDR optical fiber measurement method wherein a test fiber is spliced between a launch fiber and a termination fiber which is provided with a reflective coating at its terminal end. A laser light pulse is introduced into the launch fiber and the forward trace signal and reverse trace signal from the light pulse are detected. A correction is applied to the reverse trace signal to account for reflectivity originating at the fiber input end so that an accurate measurement can be made of certain fiber characteristics of a single-mode optical fiber.
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