| Předmět: |
Physics
Photon Optical fiber business.industry Single-mode optical fiber Physics::Optics Near and far field Laser 01 natural sciences Atomic and Molecular Physics and Optics law.invention 010309 optics Optics law 0103 physical sciences Femtosecond Orbital angular momentum of light 010306 general physics business Optical vortex |
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| Zdroj: | Optics Express. |
| ISSN: | 1094-4087 |
| Popis: | We demonstrate orbital-angular momentum (OAM) light up to a topological charge of l=3 behind a single mode fiber. Femtosecond 3D direct laser writing is used to fabricate spiral phase plates of l=1,2 and 3, composed of 10 discrete steps, on the tip of single mode optical fibers. These structures efficiently convert out-coupled light from the fiber at 785 nm wavelength into optical vortex beams carrying an orbital-angular momentum of lℏper photon. Far field intensity patterns and interferograms of the OAM beams are recorded using a CCD camera. The results are in excellent agreement with numerical simulations obtained from the wave propagation method. |
| Databáze: | OpenAIRE |
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