[10p-Z19-1~15] 3.6 Ultrashort-pulse and high-intensity lasers

[10p-Z19-7] Topological Charge Detection of Optical Vortex using Dual-comb Imaging Spectroscopy

〇Akifumi Asahara¹, Takuto Adachi¹, Seishiro Akiyama¹, Kaoru Minoshima¹ (1.Univ. of Electro-Communications)

Keywords:Optical comb, Optical vortex, Orbital angular momentum

We have proposed a concept of "optical-vortex-comb," which realizes precise spatiotemporal phase control by combining optical comb and optical vortex. In this study, we applied a measurement method combining “dual-comb spectroscopy” and “single-pixel imaging” to characterization of many kinds of optical vortices, and demonstrated hyper-spectral imaging of optical vortex light-wave. This result is expected as a great measurement technology in a wide range of fields such as chiral material study and optical communication using transverse optical modes.