[9p-M135-1~17] 3.6 Ultrashort-pulse and high-intensity lasers

[9p-M135-1] [Young Scientist Presentation Award Speech] Development of Orbital Angular Momentum-resolved Dual-vortex-comb Spectroscopy

〇Akifumi Asahara^1,2, Takuto Adachi¹, Yue Wang^1,2, Kaoru Minoshima^1,2 (1.Univ. of Electro-Communications, 2.JST, ERATO MINOSHIMA Intelligent Optical Synthesizer)

Keywords:Optical comb, Optical vortex, Dual-comb spectroscopy

We have proposed a concept, “optical-vortex-comb,” achieving precise spatiotemporal phase control by combining optical comb with optical vortex. In the previous meeting, we reported development of “dual-vortex-comb spectroscopy,” which realizes precise interferometric measurements obtaining angle information. In this presentation, we further improve the method and propose “Orbital angular momentum (OAM)-resolved dual-vortex-comb spectroscopy.” This developed method enables us to characterize optical vortex with arbitrary OAM spectrum and will pave the way for material studies with optical-vortex-comb.