Patent ID: 7585107
Filing Date: 2009-09-08
Classification: G01K

Abstract:
1. A method of generating a distributed temperature sensing (DTS) profile for an optical waveguide, comprising: irradiating the waveguide with a first light signal at a first frequency such that the waveguide generates the Raman Stokes and Raman anti-Stokes signals in response; irradiating the waveguide with second and third light signals at second and third frequencies, wherein the second and third frequencies have different values; generating the first and second light signals based on the third light signal; calculating a differential loss between the second and third frequencies at different points along the waveguide, based on reflected signals generated in response to the second and third light signals; and calculating a distributed temperature sensor (DTS) profile for the waveguide based on amplitudes of the Raman Stoke and Raman anti-Stokes signals and the differential loss calculations.