Evanescent Wave Fiber Optic Biosensor: A Theoretical Study for Detection of Human Intestine Tissues

Abstract

Fiber optic evanescent based biosensor is suggested for detection and identification of non-malignant tissues of gastrointestinal tract of stomach by determining their analogous refractive indices values. Current experimental data are considered for theoretical computations with certain variations of complex index of refraction of intestinal tissues in near infrared (NIR) region. Here we are describing intensity interrogation approach with chalcogenide glass fibers. Also, achievement of proposed sensor is approximated in terms of its sensitivity and design parameters (length of sensing area and core diameter of fiber) at various operating wavelengths falling in NIR region. The designed sensor has possibilities to produce higher sensitivity for detecting tissues of gastrointestinal tract.