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Enhanced multiplexing capacity of FBGs strain sensing using combination of intensity and wavelength division multiplexing

In this paper, we demonstrate, for the first time to our knowledge, a technique of addressing FBG sensor array involving a novel concept of intensity and wavelength division multiplexing (IWDM). In comparison with the conventional IWDM method, the proposed IWDM technique has an advantage of doubling the number of the FBG sensors to be multiplexed while keeping the same dynamic-range for each sensor