Electronic-photonic arithmetic logic unit for high-speed computing.

Area of Science:

• Integrated photonics and optical computing
• Advanced microelectronic and nanofabrication technologies
• High-speed digital circuit design

Background:

• Microprocessor clock speeds have stagnated, and Moore's Law is faltering due to physical limits in nanofabrication.
• There is a critical need for power-efficient and ultrafast computing solutions in the post-Moore's Law era.
• Integrated photonics offers a promising avenue for optical computing with its capacity for complex on-chip electro-optic circuits.

Purpose of the Study:

• To propose a novel electronic-photonic computing architecture for arithmetic logic units (ALUs).
• To enhance computation speed and power efficiency beyond state-of-the-art transistor-based circuits.
• To demonstrate a practical implementation of a wavelength division multiplexing (WDM)-based electronic-photonic ALU.

Main Methods:

• Design and implementation of a WDM-based electronic-photonic ALU architecture.
• Integration of high-speed microdisk modulators for optical signal manipulation.
• Experimental demonstration of a 4-bit ALU operating at 20 GHz.

Main Results:

• The proposed architecture disentangles the power-clock rate relationship, improving performance.
• Experimental validation of a 4-bit electronic-photonic ALU using 8 microdisk modulators.
• Achieved operation at a high frequency of 20 GHz, demonstrating practicality.

Conclusions:

• The developed electronic-photonic computing architecture offers a viable path towards high-speed and power-saving computing.
• This approach represents a significant advancement in optical computing, addressing current technological limitations.
• The WDM-based electronic-photonic ALU paves the way for next-generation computing circuits.