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Generating the 1.5 kW mode-tunable fractional vortex beam by a coherent beam combining system
Optics Letters
|September 29, 2023
Summary
Researchers developed a novel generator for high-power fractional vortex beams, achieving 1.5 kW. This breakthrough enables tunable topological charges and beam arrays for advanced optical applications.
Area of Science:
- Optics and Photonics
- Laser Physics
Background:
- Fractional vortex beams are crucial for applications like optical imaging and communication.
- Generating high average power fractional vortex beams presents a significant technical challenge.
Purpose of the Study:
- To propose and experimentally demonstrate a high average power, mode-tunable fractional vortex beam generator.
- To overcome the limitations of current methods for generating high-power structured light.
Main Methods:
- Utilized an internally sensed coherent beam combining (CBC) system.
- Employed programmable liquid crystals (LCs) for real-time topological charge tuning.
- Demonstrated a fractional vortex beam copier and array generation capability.
Main Results:
- Successfully generated a 1.5 kW continuous wave fractional vortex beam, a first to our knowledge.
- Achieved real-time tuning of topological charge from -2/3 to +2/3.
- Demonstrated the transformation of generated beams into fractional vortex beam arrays.
Conclusions:
- The developed system provides a viable solution for generating high average power fractional vortex beams.
- This advancement facilitates practical implementation of high-power structured light in various fields.
- The mode-tunable and array generation capabilities offer enhanced flexibility for optical applications.
