[20p-C303-1~11] 3.8 Optical measurement, instrumentation, and sensor

△ [20p-C303-4] Precise measurement of refractive index distribution by dual-comb spectroscopy

〇(M1)Yue Wang^1,2, Akifumi Asahara^1,2, Ken-ichi Kondo^1,2, Kaoru Minoshima^1,2 (1.University of Electro-Communications, 2.JST, ERATO MINOSHIMA Intelligent Optical Synthesizer)

Keywords:dual comb, spectroscopy, refractive index

Dual-comb spectroscopy enable precise and high rapid spectral detection in a wide frequency range, because of its great characteristic as a scanner in an interferometric spectrometer. We have applied this method to solid physical property evaluation and have established a novel measurement method for precisely evaluating the complex refractive index and thickness of solid sample. In this research, we aimed to realize a measurement system that can precisely and simultaneously evaluate the refractive index and thickness distribution of a solid sample by multiplying dual-comb spectrometry which was one-point measurement.