Sensitivity Ehancement Analysis due to Different Coating Materials of Ultra-Weak Fibre Bragg Gratings based Depth Sensor for Underwater Applications

Ocean depth is an important quantity for a variety of nautical applications, including surveillance and navigation. Many maritime applications, such as surveillance, navigation, and environmental monitoring, rely on accurate water depth measurements. Traditional depth-sensing devices may have limited sensitivity and accuracy, especially in harsh underwater environments. In this manuscript, sensitivity enhancement analysis because of various coating materials of ultra-weak fibre bragg gratings dependent depth sensor for underwater applications (SEACM-UWFBG-DSUA) is proposed. The SEACM-UWFBG-DSUA method presents a experiment of an ocean depth sensor depending upon Ultra-Weak Fibre Bragg Gratings (UWFBG). It illustrates the cause of applying a consistent layer of coating on sensitivity. A variety of resources, like metals as well as polymers such as aluminum (Al), silica (SiO2), indium (In), zinc (Zn), as well as a polymer, Polytetrafluoroethylene (PTFE), is evaluated for sensitivity and general practicality. Modulating the grating using chirp or apodization can increase its sensitivity. The study shows, apodized Polytetrafluoroethylene-coated gratings is best suited for applications, with a high sensitivity of 24.54 pm/m compared to existing techniques such as Sensitivity improvement examine because of diverse coating material of FBG-dependent depth sensor for underwater applications (SEA-FBG-DSUA) respectively.