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Optical fiber sensing based on reflection laser spectroscopy

By G. Gagliardi, M. Salza, P. Ferraro, Edmon Chehura, Ralph P. Tatam, T. K. Gangopadhyay, N. Ballard, D. Paz-Soldan, J. A. Barnes, H-P Loock, TT-Y Lam, J. H. Chow and P. De Natale


An overview on high-resolution and fast interrogation of optical-fiber sensors relying on laser reflection spectroscopy is given. Fiber Bragg-gratings (FBGs) and FBG resonators built in fibers of different types are used for strain, temperature and acceleration measurements using heterodyne-detection and optical frequency-locking techniques. Silica fiber-ring cavities are used for chemical sensing based on evanescent-wave spectroscopy. Various arrangements for signal recovery and noise reduction, as an extension of most typical spectroscopic techniques, are illustrated and results on detection performances are presented

Topics: Fiber Bragg gratings, fiber resonator, Pound-Drever-Hall method, frequency locking, laser-frequency modulation, high-birefringence fiber
Publisher: MDPI AG
Year: 2010
DOI identifier: 10.3390/s100301823
OAI identifier:
Provided by: Cranfield CERES

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