Optical Fiber Sensing Based on Reflection Laser Spectroscopy

Optical Fiber Sensing Based on Reflection Laser Spectroscopy

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An overview on high-resolution and fast interrogation of optical-fiber sensors relying on laser reflection Hair On Cowhide Headstall and Breast Collar Sets 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 Bibs 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.