Artículos de revistas
Tapered Grin Fiber Microsensor
Registro en:
Optics Express. Optical Society Of American (osa), v. 22, n. 25, p. 30432 - 30441, 2014.
10944087
10.1364/OE.22.030432
2-s2.0-84919625803
Autor
Beltran-Mejia F.
Biazoli C.R.
Cordeiro C.M.B.
Institución
Resumen
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) The sensitivity of an optical fiber microsensor based on inter-modal interference can be considerably improved by tapering a short extension of the multimode fiber. In the case of Graded Index fibers with a parabolic refractive index profile, a meridional ray exhibits a sinusoidal path. When these fibers are tapered, the period of the propagated beam decrease down-taper and increase up-taper. We take advantage of this modulation -along with the enhanced overlap between the evanescent field and the external medium- to substantially increase the sensitivity of these devices by tuning the sensor's maximum sensitivity wavelength. Moreover, the extension of this device is reduced by one order of magnitude, making it more propitious for reduced space applications. Numerical and experimental results demonstrate the success and feasibility of this approach. 22 25 30432 30441 2011/01524-8; FAPESP; São Paulo Research Foundation Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Tam, H.Y., Liu, S.Y., Guan, B.O., Chung, W.H., Chan, T.H., Cheng, L.K., Fiber bragg grating sensors for structural and railway applications (2005) Advanced Sensor Systems and Applications II, 5634, pp. 85-97 Villatoro, J., Monzón-Hernández, D., Mejía, E., Fabrication and modeling of uniform-waist single-mode tapered optical fiber sensors (2003) Appl. Opt., 42, pp. 2278-2283 Kumar, A., Varshney, R.K., Sa, C., Sharma, P., Transmission characteristics of SMS fiber optic sensor structures (2003) Optics Communications, 219, pp. 215-219 Tripathi, S.M., Kumar, A., Varshney, R.K., Kumar, Y.P., Marin, E., Meunier, J.-P., Strain and temperature sensing characteristics of single-mode-multimode-single-mode structures (2009) J. Lightwave Technol., 27, pp. 2348-2356 Biazoli, C.R., Silva, S., Franco, M.A.R., Frazão, O., Cordeiro, C.M.B., Multimode interference tapered fiber refractive index sensors (2012) Appl. Opt., 51, pp. 5941-5945 Beltrán-Mejía, F., Osório, J.H., Biazoli, C.R., Cordeiro, C.M.B., D-microfibers (2013) J. Lightwave Technol., 31, pp. 2756-2761 Wang, P., Brambilla, G., Ding, M., Semenova, Y., Wu, Q., Farrell, G., Investigation of single-mode-multimode-single-mode and single-mode-tapered-multimode-single-mode fiber structures and their application for refractive index sensing (2011) J. Opt. Soc. Am. B, 28, pp. 1180-1186 Pillai, R.S., Lorenser, D., Sampson, D.D., Deep-tissue access with confocal fluorescence microendoscopy through hypodermic needles (2011) Opt. Express, 19, pp. 7213-7221 Liu, Y., Wei, L., Low-cost high-sensitivity strain and temperature sensing using graded-index multimode fibers (2007) Appl. Opt., 46, pp. 2516-2519 (2014) Comsol Multiphysics, , Burlington, MA, USA Version 4.4 Ghatak, A., Thyagarajan, K., (1998) An Introduction to Fiber Optics, , Cambridge University Press, chap 9 Shiraishi, K., Kuroo, S.-I., A new lensed-fiber configuration employing cascaded GI-fiber chips (2000) J. Lightwave Technol., 18, p. 787 Guenther, R.D., (1990) Modern Optics, , Wiley, chap.9 Kogelnik, H., On the propagation of gaussian beams of light through lenslike media including those with a loss or gain variation (1965) Appl. Opt, 4, pp. 1562-1569 Birks, T., Li, Y., The shape of fiber tapers (1992) J. Lightwave Technol., 10, pp. 432-438