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

Author

Del Villar, Ignacio ; Socorro, Abian B. ; Corres, Jesus ; Arregui, Francisco ; Matias, Ignacio

Author_Institution

Electr. & Electron. Eng. Dept., Public Univ. of Navarra, Pamplona, Spain

Volume

31

Issue

22

fYear

2013

fDate

Nov.15, 2013

Firstpage

3460

Lastpage

3468

Abstract

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.

Keywords

fibre optic sensors; optical films; optimisation; refractive index; attenuation bands; coating; complex refractive index thin-film; device sensitivity; multimode interference; multimode segment diameter; multimode segment length; optical spectrum; optimization; sensors; single-mode-multimode-single-mode fibre structure; thin-film thickness; transfer matrix method; transmission bands; Optical fiber sensors; Optical fibers; Optical refraction; Optical variables control; Refractive index; Optical fiber interference; SMS structure; optical fiber transducers; thin films;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2013.2283943

Filename

6616572