Effect of TiO2 nano-overlays deposited with atomic layer deposition on refractive index sensitivity of long-period gratings


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International Journal on Smart Sensing and Intelligent Systems

Professor Subhas Chandra Mukhopadhyay

Exeley Inc. (New York)

Subject: Computational Science & Engineering , Engineering, Electrical & Electronic


eISSN: 1178-5608



VOLUME 7 , ISSUE 5 (December 2014) > List of articles

Special issue ICST 2014

Effect of TiO2 nano-overlays deposited with atomic layer deposition on refractive index sensitivity of long-period gratings

Krzysztof Krogulski / Mateusz Śmietana * / Bartosz Michalak / Anna K. Dębowska / Łukasz Wachnicki / Sylwia Gierałtowska / Marek Godlewski / Magdalena Szymańska / Predrag Mikulic / Wojtek J. Bock

Keywords : Atomic Layer Deposition (ALD); thin films; longperiod gratings (LPGs); titanium dioxide (TiO2); optical fiber sensors; refractive index sensing

Citation Information : International Journal on Smart Sensing and Intelligent Systems. Volume 7, Issue 5, Pages 1-5, DOI: https://doi.org/10.21307/ijssis-2019-061

License : (CC BY-NC-ND 4.0)

Published Online: 15-February-2020



This paper we discusses an effect of coating longperiod gratings (LPGs) with a thin titanium dioxide (TiO2) overlays on refractive index (RI) sensitivity of the LPG. The overlays have been obtained using atomic layer deposition (ALD) method. The method allows for deposition well-controlled in thickness, well defined in optical properties, high-RI and very conformal thin films as required for optical fiber sensors. For the investigated LPGs we obtained sensitivity of 3490 to 6471 nm per RI unit depending on range RI.

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