Tunable Generation of Structured Light Beams with Fiber Grating
Published:Dec 31, 2025 13:12
•1 min read
•ArXiv
Analysis
This paper demonstrates a method for generating and manipulating structured light beams (vortex, vector, flat-top) in the near-infrared (NIR) and visible spectrum using a mechanically tunable long-period fiber grating. The ability to control beam profiles by adjusting the grating's applied force and polarization offers potential applications in areas like optical manipulation and imaging. The use of a few-mode fiber allows for the generation of complex beam shapes.
Key Takeaways
- •Demonstrates tunable generation of structured light beams (vortex, vector, flat-top).
- •Utilizes a mechanically induced long-period fiber grating for beam manipulation.
- •Achieves propagation-invariant vector flat-top beams.
- •Works in both NIR (1060nm) and visible (532nm) wavelengths.
- •Offers potential for applications in optical manipulation and imaging.
Reference
“By precisely tuning the intensity ratio between fundamental and doughnut modes, we arrive at the generation of propagation-invariant vector flat-top beams for more than 5 m.”