Enhancing Sensitivity of Fiber Bragg Grating-Based Temperature Sensors through Teflon Coating

Dhanalakshmi, Samiappan; Kesarikiran, A. V. S.; Chakravartula, Venkatesh; Kumari, C. R. Uma; Shubham, Kumar; Aakash, Bolisetty; Kumar, R.

doi:10.1007/s11277-019-06744-w

Cited by 23 publications

(1 citation statement)

References 14 publications

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“…Various articles [15][16][17][18][19][20][21][22][23] suggested implementing the existing functions or proposed novel apodization functions for the improvement of sensing characteristics, strain and temperature measurement, dispersion compensation, structural health monitoring, etc. In a few literatures, sensitivity enhancement has been achieved by using coating materials [24,25]. In the earlier stage, metals and their compounds having high thermal expansion coefficients, were used to amplify temperature sensitivity [26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Novel Apodized Fiber Bragg Grating Applied for Medical Sensors: Performance Investigation

Arumugam¹,

Kumar²,

Dhanalakshmi³

et al. 2023

Computer Modeling in Engineering &Amp; Sciences

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Sensors play an important role in shaping and monitoring human health. Exploration of methods to use Fiber Bragg Grating (FBG) with enhanced sensitivity has attracted great interest in the field of medical research. In this paper, a novel apodization function is proposed and performance evaluation and optimization of the same have been made. A comparison was conducted between various existing apodization functions and the proposed one based on optical characteristics and sensor parameters. The results evince the implementation of the proposed apodization function for vital sign measurement. The optical characteristics considered for evaluation are Peak Resonance Reflectivity level, Side Lobes Reflectivity level and Full Width Half Maximum (FWHM). The proposed novel apodization novel function has better FWHM, which is narrower than the FWHM of uniform FBG. Sensor characteristics like a quality parameter, detection accuracy and sensitivity also show improvement. The proposed novel apodization function is demonstrated to have a better shift in wavelength in terms of temperature and pulse measurement than the existing functions. The sensitivity of the proposed apodized function is enhanced with a Poly-dimethylsiloxane coating of varying thickness, which is 6 times and 5.14 times greater than uniform Fiber Bragg grating and FBG with the proposed novel apodization function, respectively, enhancing its utilization in the field of medicine.

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