[20a-211A-1~10] 3.6 Ultrashort-pulse and high-intensity lasers

△ [20a-211A-1] Precise Interferometric Measurements for Information along Azimuth Axis using Dual-optical-vortex-comb Spectroscopy

〇Akifumi Asahara^1,2, Yue Wang^1,2, Kaoru Minoshima^1,2 (1.UEC, 2.JST,ERATO MINOSHIMA IOS)

Keywords:Optical comb, Optical vortex, Angle measurement

We have proposed a concept, “optical vortex comb,” that enables precise spatiotemporal phase control by combining optical combs with optical vortices. In this talk, we propose a novel interferometric measurement, “dual-optical-vortex-comb spectroscopy,” in which two optical-vortex-comb with different repetition frequencies and topological charges are applied, and we show results of proof-of-principle experiment. We demonstrate that this novel method extends the applicable dimension of optical comb measurements, and new kinds of angle measurements are realized.