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A temperature sensor based on a multimode–singlemode–multimode (MSM) fiber structure has been proposed and experimentally demonstrated. By utilizing the interference between fiber core and cladding modes, temperature measurement is exploited by monitoring the selected resonant dips shift of the transmission spectrum. A high temperature sensitivity of 50.65pm/°C is achieved at a certain resonant dip,...
An optical in-fiber modal interferometer-based volume strain sensor for earthquake prediction is proposed and experimentally demonstrated. The sensing element is formed by wrapping a multimode-singlemode-multimode fiber structure onto a polyurethane hollow column. Due to the modal interference between the excited guided modes in the fiber, strong interference pattern could be observed in the transmission...
This paper gives an accelerated evolutionary algorithm for structure topology optimization. It combines the merits of level set method and Evolutionary Structure Optimization (ESO) for structure topology optimization. The traditional level set algorithm has some drawbacks, for instance, its resultant optimal topology configuration depend on the initial configuration of the structure. Additionally,...
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