DISTRIBUTED OPTICAL FIBRE SENSOR

Abstract: a distributed optical fiber sensor is described to measure parameters as functions of position along a sensing optical fiber that extends along a path through an environment. the sensor includes a first probe light source to generate pulses of first probe light in first wavelength bands, a second probe light source to generate pulses of second probe light in second wavelength bands separate from the first wavelength bands, a wavelength combiner to combine the first probe light pulses and the second probe light pulses into a combined stream and launch the combined stream into the sensing optical fiber, and a receiver to receive backscattered probe light from the sensing optical fiber and separately detect both raman stokes shifted components and raman anti-stokes shifted components of the backscattered probe light, and coherent rayleigh backscattered components of the second probe light.

Inventor(s): Vincent HANDEREK

CPC Classification: G01H9/004 (Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means)

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