Fiber distributed sensing based on Rayleigh, Brillouin or Raman backscattering is just over 40 years old. However, it took almost half of that time to transform physical concepts into measuring instruments and another 10 years to achieve permanent and reliable deployment in the field. The past decades have. Raman distributed optical fiber sensing has been demonstrated to be a mature and versatile scheme that presents great flexibility and effectivity for the distributed temperature measurement of a wide range of engineering applications over other established techniques.
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