This reprint focuses on the latest developments and trends in the theory, design, fabrication, and application/validation of photonic sensors. Photonic sensors have attracted widespread interest in countless domains, including aerospace, food processing, high-energy physics experiments, environmental monitoring, medicine, the nuclear industry, oil and gas, railways, and structural health monitoring. They convey several advantages in these scenarios, such as their high-sensitivity and -resolution measurements, small size and weight, immunity to electromagnetic interference, resistance to harsh environments, long-distance monitoring, and high multiplexing capability.
