Light-temperature distribution sensor using back scattering ligh

Details Light-temperature distribution sensor using back scattering ligh Light-temperature distribution sensor using back scattering ligh

1996-02-26

1998-06-16

Biegel, Ronald

Thermal measuring and testing

Temperature measurement

Nonelectrical, nonmagnetic, or nonmechanical temperature...

374137, 25022714, G01K 1132

Patent

active

057659486

ABSTRACT:
In a light-temperature distribution sensor, Raman scattering light is extracted from back scattering light produced by a light pulse supplied into an optical fiber, thereby calculating a temperature distribution. An intensity distribution signal of anti-Stokes Raman scattering light is extracted from the back scattering light. An intensity distribution signal of Stokes Raman scattering light is extracted from the back scattering light. An intensity distribution signal of Rayleigh scattering light is extracted from the back scattering light. The intensity distribution signal of the anti-Stokes Raman scattering light and the intensity distribution signal of the Stokes Raman scattering light are normalized, with the intensity distribution signal of the Rayleigh scattering light used as reference signal. A temperature distribution on the light transmission medium is calculated on the basis of the value of a product of the normalized intensity distribution signals of the anti-Stokes Raman scattering light and the Stokes Raman scattering light.

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