Photonic computing is experiencing renewed interest, driven by the growing demands of AI computations. The Mach-Zehnder Interferometer (MZI) serves as a cornerstone of Photonic Integrated Circuits (PICs), enabling light phase modulation for parallel processing. Recent innovations, including lithium tantalate (LiTaO3) implementation and Schrödinger microcombs, are advancing the field’s efficiency. As silicon photonics technology matures, it emerges as a promising solution for AI applications.