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Characterizing and modeling backscattering in silicon microring resonators.

G C Ballesteros1, J Matres, J Martí

  • 1Universidad Politecnica de Valencia, Camino de Vera, Valencia, Spain. guibalga@ntc.upv.es

Optics Express
|January 26, 2012
PubMed
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We developed a new method to measure backscattering in silicon microring resonators. This technique accurately models resonator parameters and reveals how backscattering impacts resonance shapes.

Area of Science:

  • Photonics and Optical Engineering
  • Materials Science

Background:

  • Silicon microring resonators are crucial components in integrated photonics.
  • Accurate characterization of resonator parameters, including losses and coupling, is essential for device performance.
  • Backscattering effects can significantly degrade resonator performance but are challenging to quantify.

Purpose of the Study:

  • To present an experimental technique for characterizing backscattering in silicon microring resonators.
  • To develop a simple analytical model that accurately reproduces experimental results.
  • To demonstrate the impact of backscattering on resonator resonance shapes.

Main Methods:

  • Experimental measurement of backscattering in silicon microring resonators.
  • Development of a simple analytical model to interpret experimental data.

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  • Extraction of key resonator parameters: loss, coupling coefficients, and backscattering.

    • Main Results:

    • The experimental technique successfully characterizes backscattering.
    • The analytical model accurately reproduces the experimental findings.
    • Backscattering was shown to strongly influence the resonance shape of the resonators.
    • Consecutive resonances within the same ring can exhibit distinct backscattering parameters.

    Conclusions:

    • The presented technique and model provide a comprehensive method for analyzing silicon microring resonators.
    • Understanding and quantifying backscattering is critical for optimizing resonator performance.
    • The variability of backscattering across different resonances highlights the complexity of resonator behavior.