FBG inscription and interrogation in polypropylene coreless waveguides

Ivan Chapalo; Vasilis Sarakatsianos; Mary Konstantaki; Theodoros Manouras; Maria Vamvakaki; Stavros Pissadakis

doi:10.1117/12.3023486

20 June 2024 FBG inscription and interrogation in polypropylene coreless waveguides

Ivan Chapalo, Vasilis Sarakatsianos, Mary Konstantaki, Theodoros Manouras, Maria Vamvakaki, Stavros Pissadakis

Proceedings Volume 13001, Specialty Optical Fibres VIII; 130010D (2024) https://doi.org/10.1117/12.3023486
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Abstract

We present the inscription and characterization of fiber Bragg gratings (FBGs) in polypropylene coreless cylindrical fibers. Polypropylene material offers several advantages, such as strong chemical resistance, biocompatibility, and high tensibility. Therefore, polypropylene FBGs can be useful for sensing in chemically aggressive environments and in biomedical applications. The coreless, cylindrical polypropylene waveguides used in these experiments had a diameter of 150 μm, typical length up to 20 cm, and a refractive index of 1.49. The inscription was performed in the 1550 nm transparency window by using a phase mask technique and 193 nm excimer laser radiation. Inscribed FBGs demonstrated complex multi-peak reflection spectra due to highly multi-mode nature of the polypropylene waveguides. Due to a high attenuation of the polypropylene, the maximum waveguide FBG interrogation length -in reflection- was 6 cm. Gratings characterization demonstrated a strain sensitivity of 0.9 pm/με, a temperature sensitivity of -60.4 pm/°C and humidity-insensitive behavior.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Ivan Chapalo, Vasilis Sarakatsianos, Mary Konstantaki, Theodoros Manouras, Maria Vamvakaki, and Stavros Pissadakis "FBG inscription and interrogation in polypropylene coreless waveguides", Proc. SPIE 13001, Specialty Optical Fibres VIII, 130010D (20 June 2024); https://doi.org/10.1117/12.3023486

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