High-speed photonic device technologies in optical fiber connected millimeter-wave radar system for foreign object debris detection on runways

Precise imaging of obstacles and foreign-object debris (FOD) is one of the most important security technologies for avoiding trouble in advance. Recently, we have focused on an optical fiber connected millimeter-wave radar system using a radio over fiver (RoF) technique for effectively detecting FOD over the large area of an airport runway. In this paper, we introduce high-speed photonic devices such as a W-band frequency modulated continuous-wave (FM-CW) signal generator, a highly-sensitive quantum dot (QD) photodetector, and a QD optical frequency comb laser (QD-CML) with harmonically optical pulsation. It is expected that these advanced photonic device technologies will become potential candidates for use in the RoF technique to realize the optical fiber connected millimeter-wave radar system.