POLARIZATION - SENSING EFFECT IN DISTRIBUTED SENSING

Abstract

Instead of using separate produced sensors, distributed sensing makes use of optical fiber. Optical fibers have special qualities that allow them to function as sensors by simultaneously sensing and sending data through the same waveguide. Due to its many benefits over conventional electronic sensors, distributed sensing based on optical fiber has found a wide range of applications. However, the sensitivity and accuracy of distributed sensing can be affected by the polarization state of light. Therefore, while developing and utilizing these systems, it is crucial to properly take into account the polarization properties of the optical fiber and any polarization-sensitive components. Despite the possible minor destructive properties of polarization, polarization can help reduce interference, increase system reliability, and give useful information about the environment being studied. It is crucial to think about how polarization affects distributed sensing as technology develops and to keep looking for methods to maximize its advantages while reducing its downsides. This paper aims to explore the potential benefits and drawbacks of using polarized light as a means of sensing required parameters such as strain, temperature, and perturbation. Firstly, a literature review is conducted on the effect of polarizing light on the performance of distributed fiber sensing. Secondly, reviewed best practices based on previously researched sensing different parameters by utilizing the phenomenon. Thirdly, conducted experimental research on the effects of applied strain and temperature changes and perturbed polarization with the help of Luna OBR 4600 and 13m of single-mode (SM) optical fiber. Finally, concluded the efficiency of the proposed method for sensing the required parameters. The results of the experimental research have shown that the s-polarization was strongly affected by the higher temperatures observed, while the p-polarized was less affected. In contrast, p-polarization is much more sensitive to any kind of perturbation. Overall, these findings highlight the potential for the use of distributed fiber sensor technology to be a valuable tool in the field of security and surveillance. The results demonstrate the potential of polarization-based distributed sensing as a useful tool for security and surveillance.