Presentation
Bident: Optical Logic Synthesis via Optimal Configuration of Binary-Combiner Trees
DescriptionDespite decades of success, CMOS technology is increasingly constrained by power dissipation and propagation delay, thus motivating the exploration of photonic integrated circuits as an alternative for high-speed, energy-efficient computing. However, existing optical logic synthesis frameworks rely on an oversimplified efficiency factor model that fails to accurately capture physical attenuation and the hierarchical nature of signal degradation. This work presents Bident, a comprehensive optical logic synthesis framework that provides a physically accurate loss model and achieves optimal combiner configuration. We introduce the binary aggregate model, which explicitly reflects the binary-tree topology and input ordering in multi-input combiners. Based on this model, the Huffman tree optimization guarantees optimal Y-branch combiner configuration without requiring additional hardware resources. Meanwhile, a greedy algorithm optimally employs directional couplers at the leaf layer of a binarycombiner tree to achieve harmonic-mean efficiency at minimal hardware cost. Experimental results demonstrate that Bident achieves superior signal-attenuation reduction and lower switch cost than state-of-the-art methods, using both the conventional efficiency factor model and our binary aggregate model. A schematic-level optical circuit simulation further validates the feasibility and effectiveness of our binary-combiner configurations.
Event Type
Research Manuscript
TimeTuesday, July 285:03pm - 5:16pm PDT
LocationMtg Room 201B
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