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Switchable silica waveguide XOR/XNOR directed logic gate based on E21-E11 mode conversion
Optics Express
|September 23, 2025
Summary
This study demonstrates a novel silica waveguide XOR/XNOR optical logic gate for AI and computing. The device offers complementary optical outputs, paving the way for advanced optical information processing.
Area of Science:
- Photonics and optical engineering, focusing on integrated photonic devices.
Background:
- Optical logic gates are crucial for high-speed computing and artificial intelligence (AI).
- Existing technologies face challenges in speed, power consumption, and scalability for advanced applications.
Purpose of the Study:
- To demonstrate a novel XOR/XNOR optical logic gate using silica waveguide technology.
- To enable complementary optical outputs for advanced information processing.
Main Methods:
- Fabrication of a silica waveguide device on a CMOS-compatible platform.
- Utilizing cascaded Mach-Zehnder thermo-optic switches and a multimode interference mode converter.
- Characterization of the device's performance with monochromatic light input.
Main Results:
- Successful demonstration of a complementary XOR/XNOR optical logic gate.
- Achieved a signal-to-noise ratio greater than 10 dB across the C band.
- Verified functionality by controlling electrical Boolean inputs for optical outputs.
Conclusions:
- The proposed silica waveguide logic gate is a promising candidate for optical computing and AI.
- The device's simple structure, large bandwidth, and versatility support applications in optical networks and data processing.
- Potential applications include arithmetic operations, parity checks, and encryption/decryption.
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