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Generation of spatiotemporal optical vortices with partial temporal coherence
Optics Express
|October 7, 2021
Summary
Researchers generated a spatiotemporal optical vortex (STOV) using partially coherent light, not just mode-locked lasers. This offers a simpler, more affordable way to create transverse orbital angular momentum (OAM) light sources.
Area of Science:
- Optics and Photonics
- Laser Physics
- Quantum Optics
Background:
- Spatiotemporal optical vortices (STOV) with transverse orbital angular momentum (OAM) have been generated using coherent ultrafast pulses from mode-locked lasers.
- Existing methods require complex and expensive mode-locked laser systems.
Purpose of the Study:
- To demonstrate the generation of STOV from partially coherent light sources.
- To establish a convenient and cost-effective method for producing transverse OAM.
Main Methods:
- Theoretical modeling of STOV generation from partially coherent light.
- Experimental validation using fluctuating temporal structures.
- Characterization of the generated transverse OAM.
Main Results:
- Successfully generated STOV from a light source with partial temporal coherence.
- Demonstrated that STOV can be produced without the need for mode-locked lasers.
- Confirmed the presence of transverse OAM in the generated beams.
Conclusions:
- Partially coherent light sources can be utilized for STOV generation.
- This approach simplifies the generation of transverse OAM.
- The developed method provides a cost-effective alternative for OAM applications.
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