| Autor: |
Toru Ii Tsujimura, Yuki Goto, Koji Okada, Sakuji Kobayashi, Shin Kubo |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Review of Scientific Instruments 93, 043507 (2022); https://doi.org/10.1063/5.0077893 |
| ISSN: |
0034-6748 |
| Popis: |
In this paper, we report the development of off-axis spiral phase mirrors that can be used to generate optical vortices from a range of millimeter waves. An obliquely incident Gaussian beam is reflected from a spiral phase mirror and is converted into an optical vortex beam with a desired topological charge. The mirrors were fabricated by mechanical machining. The designed vortex properties of reflected waves were investigated experimentally by using a low-power test, where the designed topological charge was verified based on the interference pattern between a vortex beam and a Gaussian-like beam. The designed topological charge was also estimated by using a phase retrieval method specialized for a vortex beam. These off-axis spiral phase mirrors can be used for propagation experiments of radio frequency waves with helical wavefronts in magnetized plasma. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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