Modal interferometer made of microstructured optical fibre for multiparameter sensing

Joel Villatoro; Vladimir P. Minkovich; D. Monzón-Hernández; G. Badenes

doi:10.1117/12.662239

22 April 2006 Modal interferometer made of microstructured optical fibre for multiparameter sensing

Joel Villatoro, Vladimir P. Minkovich, D. Monzón-Hernández, G. Badenes

Proceedings Volume 6189, Optical Sensing II; 618906 (2006) https://doi.org/10.1117/12.662239
Event: SPIE Photonics Europe, 2006, Strasbourg, France

Abstract

The fabrication of a compact all-fibre modal interferometer that can be used to sense different parameters is reported. The device consists of a tapered large-mode-area microstructured optical fibre with collapsed air holes over a localized region. The tapering is carried out by slowly elongating the fibre while it is heated with a high-temperature oscillating flame torch. This non adiabatic method allows the collapsing of the air holes and transforms a section of the microstructured fibre into a solid one. As a consequence the fundamental HE₁₁ mode is coupled to the HE_1m cladding modes which can beat or interfere. This makes the transmission of the device versus the wavelength to exhibit an oscillatory pattern. Such a pattern shifts with strain, high temperature, or refractive index. The device is compact, can operate in a broad range of wavelengths, and can be fabricated in a few minutes which makes it attractive for optical sensing.

Citation Download Citation

Joel Villatoro, Vladimir P. Minkovich, D. Monzón-Hernández, and G. Badenes "Modal interferometer made of microstructured optical fibre for multiparameter sensing", Proc. SPIE 6189, Optical Sensing II, 618906 (22 April 2006); https://doi.org/10.1117/12.662239

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