In the world of Photonic Integrated Circuits (PICs), engineers no longer deal with electrons but with photons. Coupling loss, waveguide cracks, scattering, and absorption can all become invisible killers. Even though the current. Lastly, Spot Size Converters adjust light beam sizes between waveguides, optimizing light coupling efficiency at a low cost, but they require precise alignment and offer limited bandwidth. Each of these methods requires a laser to be placed externally to the PIC and requires precise alignment. Silicon photonics, serving as a cornerstone technology in modern information technology, demonstrates significant application potential in critical scenarios such as high-speed data center interconnects and integrated optical communication systems. However, once “light” is integrated into the chip, the game changes completely. Thereby it opens a route towards very advanced PICs with very high yield and low cost. The increasing bandwidth demands brought on by AI are now.
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