Abstract

ABSTRACT The effect of the characteristics of a generic distributed fiber sensor based on stimulated Brillouin scattering on the amplitude of the response is analyzed and a relation betw een the measurement noise on the time traces and the error on the determination of the Brillouin frequency shift is establishe d. This makes possible to propose a simple figure-of-merit to fairly compare the performance of Brillouin distributed sensing systems. Keywords: Stimulated Brillouin scattering, distributed optical fiber sensor, temperature sensing, strain sensing 1. INTRODUCTION Tremendous progresses have been reported these past few y ears related to Brillouin distributed fiber sensing that turns into one of the most vivid field of research in optical fiber sensing. Thanks to advanced and ingenious techniques the spatial resolution has been improved by at least 2 orders of magnitude from meter to centimeter range 1-7 , while recent efforts have been carried out to extend the distance range from some 30 km to 120 km and more by using remote amplification

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