Irradiation Hardness of Gan Laser Diodes for Visible Light Communications in Harsh Environments

Visible Light Communication (VLC) offers significant advantages and represents a promising solution for inter-satellite communication. However, the space environment is characterized by a high flux of energetic radiation particles, with protons being the most prevalent. Therefore, it is crucial to evaluate the radiation hardness of devices intended for VLC applications. In this study, the performance of GaN-based laser diodes was systematically characterized under proton irradiation. The results confirm the excellent radiation tolerance of these devices, highlighting their strong potential for deployment in harsh environments such as inter-satellite visible light communication systems.