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Analysis of the roughness in a sensing region on D-shaped POFs

Sequeira, F. ; Duarte, D. ; Nogueira, R.N. ; Rudnitskaya, Rudnitskaya, A. ; Cennamo, N. ; Zeni, L. ; Bilro, L.

Analysis of the roughness in a sensing region on D-shaped POFs, Proc Internacional Conf. on Plastic Optical Fibers - POF, Birmingham, United Kingdom, Vol. 1, pp. 0 - 0, September, 2016.

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The preliminary studies about the dependence of the sensitivity and resolution of a D-shaped POF sensor with the roughness of the sensing region are presented. The sensing principle is based in the variation of the transmitted optical signal with the variation of the external refractive index, from 1.332 to 1.471. The obtained results show that the sensitivity is strongly dependent on the roughness of the sensing surface and are in accordance with the simulations performed using the transfer matrix formalism. The obtained resolution (10 3 RIU) allows the further development of these sensors for chemical and/or biochemical sensing, by means of surface modification with chemical selective layers.