Design and experimental analysis of TiO2 coated eFBG sensor for chemical sensing

Azhar Shadab; Sanjeev Kumar Raghuwanshi; Md Tauseef Iqbal Ansari; Santosh Kumar

doi:10.1117/12.2647991

6 March 2023 Design and experimental analysis of TiO₂ coated eFBG sensor for chemical sensing

Azhar Shadab, Sanjeev Kumar Raghuwanshi, Md Tauseef Iqbal Ansari, Santosh Kumar

Proceedings Volume 12372, Optical Fibers and Sensors for Medical Diagnostics, Treatment and Environmental Applications XXIII; 123720J (2023) https://doi.org/10.1117/12.2647991
Event: SPIE BiOS, 2023, San Francisco, California, United States

Abstract

In the proposed work, titanium dioxide (TiO2) coated on an etched fiber Bragg grating (eFBG) sensor has been used for sensing the industrial chemicals such as glycerin. The FBGs were etched with hydrofluoric acid at a 40% concentration to interact with the outer medium before applying an optically active thin material layer for improved sensing. Raman spectroscopy and FESEM are used to characterize the sensor. An increase in the interaction of the evanescent field interacting with the analyte caused by the metal oxide layer increases sensitivity by approximately 24%. The sensitivities achieved with the bared eFBG sensor and the TiO2-coated eFBG sensor are 10.18 nm/RIU and 13.4 nm/RIU, which is better than any other earlier reported work for sensing glycerin.

Conference Presentation

Citation Download Citation

Azhar Shadab, Sanjeev Kumar Raghuwanshi, Md Tauseef Iqbal Ansari, and Santosh Kumar "Design and experimental analysis of TiO₂ coated eFBG sensor for chemical sensing", Proc. SPIE 12372, Optical Fibers and Sensors for Medical Diagnostics, Treatment and Environmental Applications XXIII, 123720J (6 March 2023); https://doi.org/10.1117/12.2647991

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