Synthesis of coupled resonator optical waveguides by cavity aggregation

Area of Science:

• Photonics and Waveguide Technology
• Optical Engineering
• Resonator Systems

Background:

• Coupled resonator optical waveguides (CROWs) are fundamental components in integrated photonics.
• Accurate determination of coupling constants is crucial for designing and optimizing CROW devices.
• Existing methods for extracting coupling parameters can be complex or limited in scope.

Purpose of the Study:

• To introduce and validate the layer aggregation method for analyzing CROWs.
• To demonstrate the method's ability to derive coupling constants directly from the frequency transfer function.
• To investigate the convergence properties and parameter dependencies of the developed algorithm.

Main Methods:

• Application of the layer aggregation method to the theoretical model of coupled resonator optical waveguides.
• Derivation of coupling constants from the frequency transfer function of the waveguide system.
• Analysis of the convergence behavior of the developed numerical algorithm.

Main Results:

• The layer aggregation method successfully yields the coupling constants between resonators in CROWs.
• The frequency transfer function serves as a direct input for parameter extraction.
• The convergence of the algorithm was examined, and key parameters influencing it were identified and discussed.

Conclusions:

• The layer aggregation method provides an effective approach for characterizing coupling in CROWs.
• This technique offers a direct and potentially simplified route to obtaining critical device parameters.
• Further investigation into parameter optimization can enhance the method's applicability.