DYNAMIC FIBER SPECKLEGRAM SENSING

We introduce a concept of dynamic sensing that uses fiber speckle fiel ds. By autonomously updating the fiber speckle patterns (i.e., using a moving reference to perform frame-to-frame comparison) on an electron ically addressable spatial light modulator, we can exploit the dynamic fiber status. In other words, by joint transforming the rapidly chang ing speckle patterns from a sensing fiber, we can determine the dynami c aspects of the fiber status. For demonstration, dynamic displacement sensing is illustrated in which we have observed that the rate change and the trend of the fiber perturbation can indeed be detected. We no te that the dynamic sensing technique can be applied to a variety of s ensing parameters, e.g., strain, stress, temperature, and possibly sei smic monitoring.