Femtosecond Laser Written Plane-by-Plane Bragg Grating Sensors in Bioresorbable Phosphate Optical Fibres

We report on the realization of different types of optical sensors in a bioresorbable phosphate glass optical fiber using a femtosecond laser operating at 517 nm. We inscribed fiber Bragg grating-based optical filters such as uniform Bragg gratings, chirped gratings, and Fabry-Perot cavities, using...

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Bibliographic Details
Published in:Journal of lightwave technology 2019-05, Vol.37 (10), p.2363-2369
Main Authors: Theodosiou, Antreas, Pugliese, Diego, Ceci-Ginistrelli, Edoardo, Boetti, Nadia G., Janner, Davide, Milanese, Daniel, Kalli, Kyriacos
Format: Article
Language:English
Subjects:
Biocompatibility
Biomedical materials
Bioresorbable optical fibre
biosensors
Bragg gratings
femtosecond laser
Fiber gratings
fibre Bragg gratings
Glass
Gratings (spectra)
Humidity
Optical fibers
Optical filters
Optical measuring instruments
Phosphate glass
Relative humidity
Sensors
Surgical implants
Temperature measurement
Ultrafast optics
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Summary:We report on the realization of different types of optical sensors in a bioresorbable phosphate glass optical fiber using a femtosecond laser operating at 517 nm. We inscribed fiber Bragg grating-based optical filters such as uniform Bragg gratings, chirped gratings, and Fabry-Perot cavities, using the plane-by-plane direct write inscription. The gratings were characterized in reflection and tested as sensors for temperature and relative humidity. We studied the stability and resilience of the gratings when inserted in high humidity environments (>95%) for 52 h and observed the evolution of the grating characteristics during this period.
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2019.2904573