Microcavity tip temperature sensor based on post-processing

Marta S. Ferreira; Jörg Bierlich; Kay Schuster; José L. Santos; Orlando Frazão

doi:10.1117/12.2026105

20 May 2013 Microcavity tip temperature sensor based on post-processing

Marta S. Ferreira, Jörg Bierlich, Kay Schuster, José L. Santos, Orlando Frazão

Proceedings Volume 8794, Fifth European Workshop on Optical Fibre Sensors; 87942E (2013) https://doi.org/10.1117/12.2026105
Event: Fifth European Workshop on Optical Fibre Sensors, 2013, Krakow, Poland

Abstract

A Fabry-Pérot microcavity tip temperature sensor based on a special design double-cladding optical fiber is proposed. The produced fiber has pure silica core and outer cladding and a silica ring doped with phosphorous. The whole ring region is removed by chemical etching post-processing. Consequently, light will be guided in the core region. In a first step, the double-cladding optical fiber is spliced to single mode fiber. Afterwards, the tip is etched in a solution of 48% hydrofluoric acid. The inner cladding will be etched faster, and the core becomes suspended and surrounded by air. The Fabry-Pérot microcavity tip sensor is subjected to temperature, and a linear sensitivity of 14.6 pm/°C is obtained.

Citation Download Citation

Marta S. Ferreira, Jörg Bierlich, Kay Schuster, José L. Santos, and Orlando Frazão "Microcavity tip temperature sensor based on post-processing", Proc. SPIE 8794, Fifth European Workshop on Optical Fibre Sensors, 87942E (20 May 2013); https://doi.org/10.1117/12.2026105

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