All-optical logic gate operating with single wavelength.

Area of Science:

• Photonics and optical computing
• Integrated optics
• Nonlinear optics

Background:

• All-optical logic gates offer potential for high-speed computing.
• Scalable designs are crucial for practical optical processing systems.
• Operating with a single wavelength simplifies system architecture.

Purpose of the Study:

• To design scalable all-optical logic gates operating at a single wavelength.
• To investigate the system's sensitivity to input power fluctuations and fabrication errors.
• To establish parameters for practical realization of these optical logic gates.

Main Methods:

• Numerical simulation using coupled mode equations.
• Analysis of wavelength and coupling coefficient fluctuations.
• Evaluation of input power stability requirements.

Main Results:

• The designed gates operate with identical input and output wavelengths.
• Wavelength fluctuations exceeding 0.3 times the resonant width degrade performance.
• Increased coupling strength enhances wavelength tolerance.
• Fabrication precision better than ±5 nm ensures error-free operation regarding coupling fluctuations.

Conclusions:

• The study provides critical insights into the stability and fabrication tolerances for scalable all-optical logic gates.
• This research bridges the gap between theoretical design and practical implementation of optical computing components.
• The findings guide the development of robust and reliable integrated photonic devices.