Reconfigurable generation of double-ring perfect vortex beam.

Area of Science:

• Optics and Photonics
• Quantum Optics

Background:

• Perfect vortex beams (PVBs) are crucial for optical trapping and communication due to their unique ring radius independence from topological charge.
• Existing methods for generating PVBs have limitations in controlling individual beam characteristics.

Purpose of the Study:

• To experimentally demonstrate the generation of reconfigurable double-ring perfect vortex beams (DR-PVBs).
• To achieve independent control over the amplitude, radius, width, and topological charge of each ring in the DR-PVB.

Main Methods:

• Utilized complex amplitude modulation (CAM) with a phase-only spatial light modulator (SLM).
• Employed computer-generated holograms for DR-PVB generation and verification.

Main Results:

• Successfully generated reconfigurable DR-PVBs with independent control over ring parameters.
• Achieved high generation quality with correlation coefficients above 0.8.
• Obtained a maximum generation efficiency of 44%.

Conclusions:

• The proposed CAM-based scheme enables flexible and independent manipulation of DR-PVB characteristics.
• The generated DR-PVBs show significant potential for advanced applications in optical tweezers and orbital angular momentum (OAM) multiplexing.