Tapered optical fibres for sensing

Tomas Martan; Jiri Kanka; Ivan Kasik; Vlastimil Matejec

doi:10.1117/12.818000

18 November 2008 Tapered optical fibres for sensing

Tomas Martan, Jiri Kanka, Ivan Kasik, Vlastimil Matejec

Proceedings Volume 7138, Photonics, Devices, and Systems IV; 71380Z (2008) https://doi.org/10.1117/12.818000
Event: Photonics, Devices, and Systems IV, 2008, Prague, Czech Republic

Abstract

Recently, optical fibre tapers have intensively been investigated for many applications e.g. in telecommunications, medicine and (bio-) chemical sensing. The paper deals with enhancement of evanescent-field sensitivity of the solid-core microstructured fibre with steering-wheel air-cladding. Enhancement of a performance of the microstructured fibre is based on reduction of fibre core diameter down to narrow filament by tapering thereby defined part of light power is guided by an evanescent wave traveling in axial cladding air holes. The original fibre structure with outer diameter of 125 µm was reduced 2×, 2.5×, 3.33×, and 4× for increasing relatively small intensity overlap of guided core mode at wavelength of 1.55 μm with axial air holes. The inner structures of tapered microstructured fibre with steering-wheel aircladding were numerically analyzed and mode intensity distributions were calculated using the FDTD technique. Analyzed fiber tapers were prepared by constructed fibre puller employing 'flame brush technique'.

Citation Download Citation

Tomas Martan, Jiri Kanka, Ivan Kasik, and Vlastimil Matejec "Tapered optical fibres for sensing", Proc. SPIE 7138, Photonics, Devices, and Systems IV, 71380Z (18 November 2008); https://doi.org/10.1117/12.818000

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