AI GPU link is playing an increasingly critical role in data centers and high-performance edge computing systems. Among the enabling technologies, silicon photonics is rapidly advancing—particularly in pluggable optical transceivers and the emerging field of co-packaged optics. Currently, external laser sources (ELS) are the mainstream approach for optical input. Assembling laser chip and fiber onto PICs remains a bottleneck. In the talk, I’ll also discuss Internal Laser Source (ILS) on PIC and 2D fiber array with metalens.