Numerical analysis of miter bend with spiral phase mirror

To excite optical vortices using high-power millimeter waves, we use a miter bend with a spiral phase mirror. Through numerical simulations, we demonstrate that vortex beams can be successfully excited by employing a spiral phase mirror that appropriately accounts for the phase difference between th...

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Bibliographic Details
Published inJournal of Advanced Simulation in Science and Engineering Vol. 12; no. 2; pp. 329 - 339
Main Authors Fujita, Yoshihisa, Goto, Yuki, Nakamura, Hiroaki, Kubo, Shin
Format Journal Article
LanguageEnglish
Published Japan Society for Simulation Technology 01.01.2025
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ISSN2188-5303
2188-5303
DOI10.15748/jasse.12.329

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Summary:To excite optical vortices using high-power millimeter waves, we use a miter bend with a spiral phase mirror. Through numerical simulations, we demonstrate that vortex beams can be successfully excited by employing a spiral phase mirror that appropriately accounts for the phase difference between the input and output modes. The simulations also reveal the generation of higher-order modes caused by diffraction inherent to the miter bend structure and unintended reflections arising from the singularity at the optical axis of the spiral phase mirror. Additionally, we propose a method to estimate the topological charge, which corresponds to the vorticity, from real-valued data. The simulation results confirm that vortex beams are successfully excited as the dominant mode.
ISSN:2188-5303
2188-5303
DOI:10.15748/jasse.12.329