[19p-438-1~19] 3.8 Optical measurement, instrumentation, and sensor

△ [19p-438-13] Precise measurement of phase refractive index based on dual-comb spectroscopy

〇(M2)Yue Wang^1,2, Akifumi Asahara^1,2, Ichiro Shoji³, Takashi Notake⁴, Hiroaki Minamide⁴, Kaoru Minoshima^1,2 (1.the UEC, 2.JST, ERATO MINOSHIMA Intelligent Optical Synthesizer, 3.Chuo Univ., 4.RIKEN Center for Advanced Photonics)

Keywords:dual-comb spectroscopy, phase refractive index

In recent years, we have applied dual-comb spectroscopy (DCS) to the evaluation of solid physical properties and have established a new measurement method to precisely evaluate the group refractive index and thickness of samples. For the design of optical devices such as lenses, the measurement of the phase refraction index is important. In this study, we aimed to realize the phase refractive index precisely by using a stepped sample.