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In recent years, the Brillouin Optical Time Domain Reflectometry (BOTDR) based optical fibre sensing technique has attracted great attention as a distributed monitoring method. Current BOTDR instruments are suitable for strain measurements over a certain distance (termed spatial resolution) . |
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Stimulated Brillouin scattering (SBS) |
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Brillouin scattering can be optically stimulated leading to the greatest intensity of the scattering mechanism and consequently an improved signal-to-noise ratio. |
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The construction of the Extrinsic Fabry-Perot Interferometer (EFPI) is first described by Murphy et al. The Fabry-Perot (FP) cavity is formed by a single mode fiber and a multimode fiber sealed inside a hollow core tube. |
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BOTDA refers to Brillouin Optical Time Domain Analysis.The BOTDA sensor system equipped with one electrooptic odulator has been studied for measuring distributed strain and temperature. |
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Fiber Bragg Grating(FBG) is one of the most popular optical fiber sensing technologies. Bragg grating is written into a segment of Ge-doped single-mode fiber in which a periodic modulation of the core refractive index is formed by exposure to a spatial pattern of ultraviolet (UV) light.
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