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Optical Engineering

Fabrication of an intrinsic fiber Fabry-Pérot interferometer involving simple in situ control of multilayer TiO2-SiO2 mirrors: material properties studies and cavity interrogation procedure
Author(s): Ryad Bendoula; Bruno Wacogne; Christian Pieralli; Tijani Gharbi
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Paper Abstract

We describe the fabrication of an intrinsic fiber Fabry-Pérot interferometer meant to be used in white light interferometry sensing experiments. It requires the elaboration of a cavity exhibiting a finesse of about 2, and therefore, cavity mirrors with a reflection coefficient of about 23%. The different steps involved in the fabrication of the cavity are addressed. We discuss the optical properties of the e-beam deposited TiO2 and SiO2 multilayer mirrors used for the fabrication of the cavity. In this part, a convenient method for measuring the complex refractive index of the materials is proposed, as well as an in situ monitoring technique used to accurately control the film properties. We next study the evolution of the mirror reflectivity with the splicing procedure, and we propose a modeling of the mirror composition after splicing. Then, the fabrication of a 20-mm-long Fabry-Pérot cavity exhibiting a visibility of 0.5 is presented. In this section, an efficient signal processing is proposed to reduce any measurement noise.

Paper Details

Date Published: 1 September 2005
PDF: 10 pages
Opt. Eng. 44(9) 095601 doi: 10.1117/1.2049273
Published in: Optical Engineering Volume 44, Issue 9
Show Author Affiliations
Ryad Bendoula, Univ. de Franche-Comté (France)
Bruno Wacogne, Ctr. National de la Recherche Scientifique (France)
Christian Pieralli, Univ. de Franche-Comté (France)
Tijani Gharbi, Univ. de Franche-Comté (France)

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