Sensitivity analysis of TiO2 coated fibre Bragg grating sensor for far infrared detection of chemicals

Sanjeev Kumar Raghuwanshi; Yadvendra Singh; Azhar Shadab; Purnendu Shekhar Pandey; Om Prakash; Pankaj Kumar Saini

doi:10.1117/12.2542908

20 February 2020 Sensitivity analysis of TiO₂ coated fibre Bragg grating sensor for far infrared detection of chemicals

Sanjeev Kumar Raghuwanshi, Yadvendra Singh, Azhar Shadab, Purnendu Shekhar Pandey, Om Prakash, Pankaj Kumar Saini

Proceedings Volume 11233, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XX; 1123306 (2020) https://doi.org/10.1117/12.2542908
Event: SPIE BiOS, 2020, San Francisco, California, United States

Abstract

In this paper, sensitivity analysis has been carried out of TiO₂ coated fiber Bragg grating (FBG) sensor for chemical detection. FBG has been fabricated by Cu-vapour laser based second harmonic generation technique. Then TiO₂ is coated in home on FBG sensing head by targeting the 99.99% pure TiO₂ material by electron beam gun evaporation system. The thickness of TiO₂ has been numerically optimized irrespective of FBG design parameters, before depositing the material on FBG sensing head. It has been found that the proposed sensor is quite able to sense a minute change of adulteration in chemical with an accuracy of more than 0.01 ppm. After developing and testing of the sensor, the fieldwork will be decided at Indian coal mines for their possible deployment in coal fields.

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Sanjeev Kumar Raghuwanshi, Yadvendra Singh, Azhar Shadab, Purnendu Shekhar Pandey, Om Prakash, and Pankaj Kumar Saini "Sensitivity analysis of TiO₂ coated fibre Bragg grating sensor for far infrared detection of chemicals", Proc. SPIE 11233, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XX, 1123306 (20 February 2020); https://doi.org/10.1117/12.2542908

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