Fiber Bragg Grating Sensors for Cardiorespiratory Monitoring: A Review

Systems for cardiorespiratory monitoring hold tremendous promise for many applications in clinical settings, harsh environments, sports science and telemonitoring. However, the translation in the real world is challenging because it is difficult to develop unobtrusive and comfortable systems with high metrological performance. Recent advances in fiber optic technology in the field of sensing and their application to instrument wearable systems can tackle the main issues in this field. In this work, we focused on the recent advances in cardiorespiratory monitoring of fiber Bragg grating (FBGs) sensors which are one of the most popular sensors based on fiber optic technology. We provide an overview of the FBGs working principle and performance. We also describe the most popular and promising configurations based on FBGs used for cardiorespiratory monitoring.