8- https://doi.org/10.1063/5.0061590
Femtosecond laser direct writing continuous phase vortex gratings with proportionally distributed diffraction energy
- Sep 27, 2021
- Applied Physics Letters
- Liqun Xu +11 more
In this Letter, we propose a type of continuous phase vortex gratings (CPVGs), which are able to generate a series of vortex beams with equal or proportional diffracted energies and different topological charges (TCs). A set of CPVGs with dimensions (60 × 60 × 1.1 μm3) are directly designed by mathematical equations, which avoids the use of iterative algorithms. The CPVGs are fabricated by femtosecond laser direct writing (FsLDW) with photoresist, and the experimentally generated vortex beams are in good agreement with the theoretical designs, exhibiting high optical efficiencies. In addition, we realized a CPVG onto the tip of a composite fiber for integrated optical systems. Our work paves the way for applications in optical communications, optical manipulations, and high-performance integrated optics.
- # Applications In Optics
- # Femtosecond Laser Direct Writing
- # Applications In Optical Communications
- # Continuous Vortex
- # Vortex Beams
- # Applications In Integrated Optics
- # Topological Charges
- # Optical Manipulations
- # Theoretical Designs
- # Mathematical Equations
