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Generation of optical vortices by using binary vortex producing lenses.

N Londoño, E Rueda, J A Gómez

|May 14, 2015

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Researchers generated high-quality optical vortices using a low-capacity liquid-crystal spatial light modulator. This breakthrough enables creating optical vortices with devices offering minimal phase modulation, advancing optical vortex generation technology.

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Area of Science:

Optics and Photonics
Quantum Information Science

Background:

Optical vortices are crucial for applications in optical trapping, quantum information, and microscopy.
Generating high-quality optical vortices typically requires devices with significant phase modulation capabilities.

Purpose of the Study:

To demonstrate the generation of high-quality optical vortices with low phase modulation capacity.
To present an experimental setup utilizing a liquid-crystal spatial light modulator (SLM) for vortex generation.

Main Methods:

Utilized a vortex producing lens with two phase levels displayed on an SLM.
Employed a phase-shifting method directly programmed onto the SLM, eliminating mechanical displacement.
Optimized experimental parameters for high-quality optical vortex generation.

Main Results:

Successfully generated high-quality optical vortices with varying topological charges.
Achieved vortex generation using an SLM with a phase modulation capacity of approximately 1.2π.
Recovered both the phase and intensity profiles of the generated optical vortices.

Conclusions:

High-quality optical vortices can be generated using devices with very low phase modulation capacity.
The described method offers a practical and efficient approach for optical vortex generation.
This work paves the way for more accessible and cost-effective optical vortex generation systems.