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Polarization conversion in ring resonator phase shifters.

Andrea Melloni1, Francesco Morichetti, Mario Martinelli

  • 1Dipartimento di Elettronica e Informazione, Politecnico di Milano, Via Ponzio 34/5, 20133 Milano, Italy. melloni@elet.polimi.it

Optics Letters
|December 21, 2004
PubMed
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Polarization rotation in curved waveguides strongly enhances at resonance in phase shifter ring resonators. This effect can be used to develop new optical devices or may be detrimental to existing ones.

Area of Science:

  • Optics and Photonics
  • Waveguide Theory
  • Resonator Physics

Background:

  • Curved waveguides can induce polarization rotation.
  • Ring resonators are key components in photonic integrated circuits.
  • Understanding polarization effects is crucial for device performance.

Purpose of the Study:

  • Investigate the impact of polarization rotation in curved waveguides on phase shifter ring resonators.
  • Analyze the spectral behavior of these devices under polarization rotation.
  • Explore the potential applications and drawbacks of this phenomenon.

Main Methods:

  • Theoretical derivation of the vectorial transfer function for ring resonators.
  • Experimental investigation of polarization rotation effects.

Related Experiment Videos

  • Analysis of spectral behavior at resonance.

    • Main Results:

    • Strong enhancement of polarization rotation at resonance in curved waveguides.
    • Derivation of conditions for complete TE to TM polarization conversion.
    • Experimental verification of the derived conditions.

    Conclusions:

    • Polarization rotation in curved waveguides significantly affects ring resonator spectral behavior.
    • The observed phenomenon can be either detrimental or beneficial for device applications.
    • Conditions for total polarization conversion were experimentally validated, opening avenues for new device designs.