Programmable Photonic Circuit for Optical Logic Operations and 2-Bit Decoding

Noel Francisco Prado Bucaro; Yushan Hu; Satoshi Sunada; Takeo Maruyama

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arXiv · 2509.20825

Programmable Photonic Circuit for Optical Logic Operations and 2-Bit Decoding

Noel Francisco Prado Bucaro·Yushan Hu·Satoshi Sunada·Takeo Maruyama

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Abstract

We present a programmable silicon photonic circuit composed of cascaded multiport directional couplers interleaved with thermo-optic phase shifters. The device forms a reconfigurable interferometric network capable of realizing arbitrary $N \times N$ unitary transformations. By tuning the phase shifters, the same circuit can be configured to perform both optical logic gates and 2-bit decoding functions. Optimal phase settings are determined through Bayesian optimization. The circuit maintains stable operation across multiple wavelengths with 50 GHz spacing, suggesting potential for wavelength-parallel optical processing. These results highlight a pathway toward programmable and integrated photonic circuits.

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Noel Francisco Prado Bucaro, Yushan Hu, Satoshi Sunada, Takeo Maruyama. 2025-09-25. Programmable Photonic Circuit for Optical Logic Operations and 2-Bit Decoding. https://arxiv.org/abs/2509.20825

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