Strain characterization of suspended-core fiber tapers

Ricardo M. André; Susana O. Silva; Martin Becker; Kay Schuster; M. Rothhardt; H. Bartelt; Manuel B. Marques; Orlando Frazão

doi:10.1117/12.922812

25 April 2012 Strain characterization of suspended-core fiber tapers

Ricardo M. André, Susana O. Silva, Martin Becker, Kay Schuster, M. Rothhardt, H. Bartelt, Manuel B. Marques, Orlando Frazão

Author Affiliations +

Proceedings Volume 8426, Microstructured and Specialty Optical Fibres; 84260G (2012) https://doi.org/10.1117/12.922812
Event: SPIE Photonics Europe, 2012, Brussels, Belgium

Abstract

Suspended core fiber tapers with different cross sections (from 70μm to 120μm diameter) were produced by filament heating. Before obtaining the taper, the spectral behavior of the suspended core fiber presents multimode interference. When the taper is made an intermodal interference is observed. This effect is clearly visible for high taper reduction. The spectral response of the microtaper inside the suspended core fiber is similar to a beat of two interferometers. The microtaper was subjected to strain, and an increase of sensitivity with the reduction of the transverse area was observed. When the taper was immersed in liquids with different refractive indices or subjected to temperature variations, no spectral change occurred.

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Ricardo M. André, Susana O. Silva, Martin Becker, Kay Schuster, M. Rothhardt, H. Bartelt, Manuel B. Marques, and Orlando Frazão "Strain characterization of suspended-core fiber tapers", Proc. SPIE 8426, Microstructured and Specialty Optical Fibres, 84260G (25 April 2012); https://doi.org/10.1117/12.922812

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KEYWORDS

Cladding

Sensors

Structured optical fibers

Fiber characterization

Head

Refractive index

Single mode fibers

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