Implementation and Analysis of Fiber Optic Sensor for Simultaneous Measurement of Vital Signs Using Fiber Bragg Gratings

Abstract

Vital sign monitoring acts as a highly significant diagnostic method. newlineContinuous and accurate monitoring of vital signs like temperature, heart rate, and blood newlinepressure aids in easy and fast disease diagnosis. Existing methods that enable continuous newlinemonitoring, such as smart watches, are not accurate enough to be used as a benchmark newlinefor diagnosing diseases. Existing sensors has a tradeoff between portability of the device newlineand accuracy of the measurement, and are prone to Electro-Magnetic Interference (EMI). newlineSimultaneous measurement of these signs has become the need of the hour. Intrinsic Fiber newlineOptic Sensors (IFOSs) act as a solution for this, as they are highly immune to EMI and newlineRadio Frequency Interference (RFI), small size, remote sensing, low loss, resistant to newlinecontamination and corrosion, and enables multiparameter sensing. newlineIn this thesis, IFOSs based sensors are implemented for simultaneous newlinemeasurement of vital signs such as temperature and heart rate. Enhancement in newlinemeasurement is obtained by proposing a novel apodization function to improve newlinesensitivity, detection accuracy, quality parameter and wavelength shift for the applied newlinechange in temperature and strain. The proposed apodization is optimized for grating newlinelength and index modulation. The effect of coating is studied on the proposed apodization newlinefor enhancement of temperature and strain sensitivity newline