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Experimental setup of the liquid-core Bragg fiber sensor; an 80 cm fiber is coiled into a 14 cm diameter coil. The inset is cross section of the Bragg fiber.
Simulated confinement loss of the fundamental mode of the Bragg fiber filled with a set of NaCl solutions. The weight concentrations (wt %) and RIs of the NaCl solutions are listed in the figure.
Experimental transmission spectra of Bragg fiber sensor filled with NaCl solutions.
Transmission peak shift obtained from the experimental measurements (red dashed line) and the TMM simulations (black solid line).
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