Analysis of an optically controlled photonic switch

Area of Science:

• Photonics
• Optical Engineering
• Materials Science

Background:

• The principle of controlling light coupling between fiber waveguides using a third waveguide's resonant interference was previously established.
• A detailed analysis of photonic switch operation based on this principle is presented.

Purpose of the Study:

• To provide significant operational details for a photonic switch.
• To present a more complete analysis of the photonic switch mechanism.
• To identify conditions for material selection and operational tolerances.

Main Methods:

• Analysis of resonant interference conditions for slab and fiber control waveguides.
• Investigation of light confinement within the control waveguide.
• Determination of spatial fluctuation tolerances for the control light beam.
• Calculation of tolerances for waveguide spacing and refractive index.

Main Results:

• Multiple-resonant conditions were identified for slab and fiber control waveguides at high refractive indices.
• Control light remains confined to the control waveguide, not entering the switch output.
• Photonic switch operation is unaffected by spatial fluctuations of the control light beam.
• Tolerances for critical parameters like spacing and refractive index were determined.

Conclusions:

• The findings facilitate material selection for photonic switches based on refractive index and Kerr coefficient.
• The photonic switch design ensures that control light is confined, enhancing stability.
• Operational tolerances are defined, providing practical guidelines for fabrication and implementation.