In this paper it is verified, from experimental results, that the Raman susceptibility asymmetry is found as a key factor to
improve dynamic range in distributed anti-Stokes Raman thermometry sensor which operates in stimulated regime.
Improvements are discussed from experimental results of the spatial evolution of the anti-Stokes and Stokes branches for
different Raman anti-Stokes wavelengths.
This paper shows an analytical and numerical method to determine some important parameters associated with Raman-
Brillouin hybrid distributed fiber sensors by solving the governing differential equations. It is considered pump depletion
caused by all involved effects: Rayleigh, Raman and Brillouin. Solutions are discussed for two important cases, one
apply simultaneously spontaneous Raman and Brillouin scattering and another apply Brillouin stimulated and Raman
spontaneous. It is demonstrated that sensors length can be maximized in one of the cases, in a good agreement with
literature; it is also discussed the implementation of the sensor and its feasibility for both cases.
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