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Tunable metafibers: remote spatial focus control using 3D nanoprinted holograms on dual-core fibers
Jun Sun1, Wenqin Huang1, Adrian Lorenz1
1Department of Fiber Photonics, Leibniz Institute of Photonic Technology, 07745, Jena, Germany.
Light, Science & Applications
|July 7, 2025
Summary
Researchers developed a novel Metafiber for fast, alignment-free optical focus control. This breakthrough uses 3D nanoprinted holograms for dynamic spatial light manipulation in various applications.
Area of Science:
- Photonics and Nanotechnology
- Optical Engineering
Background:
- Tunable light focusing is crucial for many applications.
- Existing methods often require complex alignment and are not integrated into fibers.
Purpose of the Study:
- To present a novel Metafiber concept for integrated spatial focus control.
- To demonstrate fast, alignment-free, and monolithic focus modulation within a fiber.
Main Methods:
- Utilized 3D nanoprinted intensity-sensitive phase-only on-fiber holograms.
- Employed dual-core fiber with controlled power adjustment for interference patterns.
- Integrated computational optimization, advanced 3D nanoprinting, and fiber fabrication.
Main Results:
- Achieved the first demonstration of fast, alignment-free, fiber-integrated spatial focus control.
- Established a direct correlation between hologram intensity distribution and focus position.
- Validated the monolithic Metafiber platform's feasibility and efficiency through experiments and simulations.
Conclusions:
- The developed Metafiber platform enables dynamic and precise control of light focus.
- This technology has transformative potential in optical manipulation, laser micromachining, telecommunications, and surgery.
