Photonic radar for contactless vital sign detection

Abstract Vital sign detection is used across ubiquitous scenarios in medical and health settings, contact wearable sensors have been widely deployed. However, they are unsuitable for patients with burn wounds or infants insufficient areas attachment. Contactless can be achieved using camera imaging, but it susceptible to ambient light conditions has privacy concerns. Here we report a photonic radar non-contact vital overcome these challenges. This achieve millimetre-level range resolution based on synthesized signals bandwidth of up 30 GHz. The high the system enables accurate respiratory from breathing simulators cane toad as human proxy. Moreover, demonstrate that optical generated proposed enable ranging (LiDAR). demonstration reveals potential sensor-fusion architecture combine complementary features LiDAR improved sensing accuracy resilience. work provides technical basis contactless high-resolution meet increasing demands future healthcare applications.