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Proceedings Paper

Femtosecond laser micromachining of Fabry-Perot cavity in fibre Bragg grating
Author(s): Rodrigo Fiorin; Fernando N. Cidade; Jociel L. S. Adachi; Lucieli Rossi; Valmir de Oliveira; Ilda Abe; Hypolito J. Kalinowski
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Paper Abstract

A 10 μm (length) × 75 μm (depth) open channel is fabricated in fibre Bragg gratings (FBG) by femtosecond laser micromachining. The FBG Fabry-Perot (FP) cavity formed by this complex structure has a length of 4 mm; value estimated from interference spectrum for the air open channel. Reflection spectra of FBG FP cavity as a function of the temperature shows the cavity phase change. The sensor is thermally characterized by filling polymer in the channel and subsequent UV curing; the results show a period shift of approximately 12 x10-3, value obtained of interferometer pattern for 30°C temperature range.

Paper Details

Date Published: 28 September 2015
PDF: 4 pages
Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 963471 (28 September 2015); doi: 10.1117/12.2195087
Show Author Affiliations
Rodrigo Fiorin, Federal Univ. of Technology, Paraná (Brazil)
UniBrazil (Brazil)
Fernando N. Cidade, Federal Univ. of Technology, Paraná (Brazil)
Jociel L. S. Adachi, Federal Univ. of Technology, Paraná (Brazil)
Lucieli Rossi, Federal Univ. of Technology, Paraná (Brazil)
Valmir de Oliveira, Federal Univ. of Technology, Paraná (Brazil)
Ilda Abe, Federal Univ. of Technology, Paraná (Brazil)
Hypolito J. Kalinowski, Federal Univ. of Technology, Paraná (Brazil)


Published in SPIE Proceedings Vol. 9634:
24th International Conference on Optical Fibre Sensors
Hypolito José Kalinowski; José Luís Fabris; Wojtek J. Bock, Editor(s)

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