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Related Experiment Videos

Unstable resonator with canceling edge waves: rectangular aperture.

T R Ferguson1, M E Smithers, J F Perkins

  • 1U.S. Air Force Weapons Laboratory/ARDF, Kirtland Air Force Base, New Mexico 87117-6008, USA.

Applied Optics
|March 1, 1986
PubMed
Summary
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Adding a phase step to feedback mirrors mitigates diffraction issues in optical resonators. This technique improves intensity profiles and alignment, enhancing resonator performance across various aperture types.

Area of Science:

  • Optics and Photonics
  • Optical Engineering

Background:

  • Diffraction by outcoupling apertures negatively impacts optical resonator performance.
  • Key parameters affected include intensity profiles, feedback ratios, and alignment sensitivity.

Purpose of the Study:

  • To investigate methods for alleviating deleterious diffraction effects in optical resonators.
  • To analyze the efficacy of introducing a phase step near the feedback mirror edge.

Main Methods:

  • Theoretical analysis and simulation of optical resonator behavior.
  • Investigating the impact of phase steps on rectangular and circular apertures.
  • Examining centered and off-centered aperture configurations.

Main Results:

  • A phase step near the feedback mirror edge effectively alleviates diffraction effects.

Related Experiment Videos

  • Optimal phase step parameters for rectangular apertures are comparable to those for circular apertures.
  • Intensity profiles show improvement for both centered and off-centered apertures.

    • Conclusions:

    • Phase step implementation is a viable strategy to enhance optical resonator performance.
    • The method's limitations, particularly near the optic axis, were identified and analyzed.