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Hybrid polymer–glass planar Bragg grating as a temperature and humidity sensor

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Abstract

This paper presents the design and construction of a new planar optical Polymer Waveguide Bragg grating (PWBG) temperature and humidity sensor realized by polymer-glass hybrid technology composition with a new layout concept. The Bragg grating of a sensor was made by a Direct Laser Writing (DLW) in Poly (methyl methacrylate) (PMMA) formed on a multimode waveguide realized in a glass substrate by Ag+ ↔ Na+ ion exchange. The fabricated hybrid Bragg grating structure exhibited more than 10 dB of the attenuation dip, equivalent to higher than 90% diffraction efficiency. The fabricated hybrid PWBG sensor exhibited high temperature and humidity sensitivity in contrast to glass-based sensors of − 48.6 pm/°C and 54.16 pm·RH−1, respectively.

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Acknowledgements

This work was supported in part by the Student Grant Competition of the Czech Technical University in Prague under the grant number of SGS20/175/OHK3/3T/13 and by the Centre of Advanced Applied Natural Sciences, Reg. No. CZ.02.1.01/0.0/0.0/16 _019/0000778, supported by the Operational Program Research, Development and Education, co-financed by the European Structural and Investment Funds and the state budget of the Czech Republic. The authors acknowledge fruitful cooperation in the fabrication process with experts from the Department of Solid State Engineering, University of Chemistry and Technology, Prague, Czech Republic, and SQS Vlaknova optika company.

Funding

This work was supported in part by Centre of Advanced Applied Natural Sciences, Reg. No. CZ.02.1.01/0.0/0.0/16_019/0000778, supported by the Operational Program Research, Development and Education, co-financed by the European Structural and Investment Funds and the state budget of the Czech Republic.

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Correspondence to V. Jerabek.

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Mares, D., Prajzler, V., Martan, T. et al. Hybrid polymer–glass planar Bragg grating as a temperature and humidity sensor. Opt Quant Electron 54, 590 (2022). https://doi.org/10.1007/s11082-022-04003-0

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  • DOI: https://doi.org/10.1007/s11082-022-04003-0

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