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This study shows vector vortex beams (VVBs) resonating in a triangular optical cavity. Their differing resonance points suggest potential for mode sorting applications.

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Area of Science:

  • Optics and Photonics
  • Quantum Optics

Background:

  • Vector vortex beams (VVBs) are a class of light beams with unique polarization and phase structures.
  • Optical cavities are fundamental components in laser systems and optical experiments.

Purpose of the Study:

  • To experimentally demonstrate the resonance of first-order VVBs within a triangular optical cavity.
  • To investigate the potential of using a triangular resonator for mode sorting based on VVB symmetry properties.
  • To implement a Pancharatnam phase shifter (PPS) for compensating cavity-induced birefringence.

Main Methods:

  • Experimental setup involving a triangular optical cavity and first-order VVBs.
  • Analysis of resonance conditions for radial and azimuthal VVBs.
  • Integration of an intracavity Pancharatnam phase shifter (PPS).

Main Results:

  • Successful experimental demonstration of first-order VVB resonance in a triangular optical cavity.
  • Observation that radial and azimuthal VVBs do not resonate at the same cavity length due to symmetry.
  • Demonstration of PPS functionality for birefringence compensation.

Conclusions:

  • Triangular optical cavities can support resonance of first-order VVBs.
  • The differential resonance behavior of VVBs offers a pathway for optical mode sorting.
  • The implemented PPS effectively compensates for cavity mirror birefringence, enhancing VVB stability.