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Optimization of Sensors Based on Multimode Interference in Single-Mode–Multimode–Single-Mode Structure

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5 Author(s)
Del Villar, I. ; Electr. & Electron. Eng. Dept., Public Univ. of Navarra, Pamplona, Spain ; Socorro, A.B. ; Corres, J.M. ; Arregui, F.J.
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By coating a single-mode-multimode-single-mode (SMS) structure with a complex refractive index thin-film the central wavelength of the transmission and attenuation bands of the optical spectrum can be shifted. By adequate selection of multimode segment length and diameter, the thin-film thickness and the thin-film refractive index, the sensitivity of the device to the surrounding medium refractive index, the thickness of the thin-film or the refractive index of the thin-film can be optimized. Experimental results are corroborated numerically with the transfer matrix method.

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Lightwave Technology, Journal of  (Volume:31 ,  Issue: 22 )