Browsing by Author "Chow, Jong H."

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    Optical fiber sensing based on reflection laser spectroscopy
    (MDPI , 2010-03-05T00:00:00Z) Gagliardi, Gianluca; Salza, Mario; Ferraro, Pietro; Chehura, Edmon; Tatam, Ralph P.; Gangopadhyay, Tarun K.; Ballard, Nicholas; Paz-Soldan, Daniel; Barnes, Jack A.; Loock, Hans-Peter; Lam, Timothy T-Y; Chow, Jong H.; De Natale, Paolo
    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.