Distributed vibration sensing system using multimode fiber

Optical waveguides – Optical waveguide sensor

Reexamination Certificate

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Details

Type

Reexamination Certificate

Status

active

Patent number

07668411

Description

ABSTRACT:
An optical time domain reflectometry (OTDR) system is configured to detect Rayleigh backscatter reflected from a multimode sensing optical fiber. The system includes a single spatial mode filtering system to select a single speckle of the Rayleigh backscatter produced in response to an optical pulse launched into the multimode fiber. The detected single speckle may be used for distributed disturbance (vibration) detection.

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