Research field (2)：
Optical engineering and photonics
, Semiconductors, optical and atomic physics
Research theme for competitive and other funds (15)：
2021 - 2026 Second earth search by high-precision line-of-sight velocity measurement using visible ultra-broadband laser comb
2022 - 2025 Development of a high-precision method for measuring the group refractive index using a dual-comb spectral interferometer and a double-sided interferometer.
2022 - 2025 2種の光コムの高度な制御による高速かつ高精度な分光技術の創出
2021 - 2024 光コムのオフセット周波数を用いた偏光状態の精密計測
2021 - 2024 Thermodynamic temperature determination by thermal radiation heterodyne detection using an optical frequency comb
2021 - 2024 超高精度多成分微量ガス分析のためのデュアルコム共振器モード分散分光法の開発
2020 - 2023 Development of a method for small mass measurements using the new definition of the kilogram based on the Planck constant
2019 - 2022 Construction of Temperature Standard Based on New Definition of SI by Optical Comb Thermometry
2018 - 2021 High speed and high resolution spectroscopy using two types of optical frequency combs
2016 - 2019 Research to realize the definition of the kilogram based on the fundamental constants
2016 - 2019 Molecular gas thermometry using dual-comb spectroscopy
2016 - 2018 Development of the polarization-sensitive dual comb spectroscopy
2015 - 2018 Dual-comb spectroscopy at visible wavelength range using Er fiber combs
2014 - 2017 Development of the ultra-stable optical cavity using a ceramic spacer
2014 - 2017 Development of an optical frequency comb spanning from visible to mid-infrared
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Papers (64)：
Akiko Nishiyama, Sho Okubo, Takumi Kobayashi, Akio Kawasaki, Hajime Inaba. Measurement of transition frequencies and hyperfine constants of molecular iodine at 520.2 nm. Journal of the Optical Society of America B. 2024
Sho Okubo, Kana Iwakuni, Hideki Kato, Feng-Lei Hong, Hiroyuki Sasada, Hajime Inaba, Koichi M.T. Yamada. The pressure effect on the line profiles observed in the ν1 + ν3 band of acetylene: Revisited. Journal of Molecular Spectroscopy. 2023. 396. 111823-111823
Kana Iwakuni, Aki Takahashi, Sho Okubo. Noise characteristics of a polarization-duplex dual-comb fiber laser based on a single gain fiber. Results in Optics. 2023. 12. 100476-100476
Keisuke Nakamura, Ken Kashiwagi, Sho Okubo, Hajime Inaba. Erbium-doped-fiber-based broad visible range frequency comb with a 30 GHz mode spacing for astronomical applications. Optics Express. 2023. 31. 12. 20274-20274
Kana A. Sumihara, Sho Okubo, Makoto Okano, Hajime Inaba, Shinichi Watanabe. Ultra-precise determination of thicknesses and refractive indices of optically thick dispersive materials by dual-comb spectroscopy. Optics Express. 2022. 30. 2. 2734-2734
大久保章. High Resolution, High Precision Optical Frequency Comb Spectroscopy and Its Applications. 光学. 2024. 53. 2
柏木謙, 大久保章, 稲場肇. High resolution and high speed dual-comb spectroscopy by two types of combs. 応用物理学会春季学術講演会講演予稿集(CD-ROM). 2023. 70th
松本匡史, 松本匡史, 大久保章, 柏木謙, 中嶋善晶, 稲場肇. Spectral Broadening of High Repetition Rate Optical Frequency Comb for Calibration of Spectrographs for Radial Velocity Measurements of Astronomical Objects. 応用物理学会春季学術講演会講演予稿集(CD-ROM). 2023. 70th
倉本直樹, 狩野祐也, 藤田一慧, 大田由一, ZHANG Lulu, 東康史, 黒河明, 大久保章, 稲場肇. Realization of the new kilogram based on the Planck constant. 日本分析化学会有機微量分析研究懇談会・計測自動制御学会力学量計測部会合同シンポジウム講演要旨集. 2023. 90th-122nd
High resolution and high speed dual-comb spectroscopy by two types of combs
(応用物理学会春季学術講演会講演予稿集(CD-ROM) 2023)
Spectral Broadening of High Repetition Rate Optical Frequency Comb for Calibration of Spectrographs for Radial Velocity Measurements of Astronomical Objects
(応用物理学会春季学術講演会講演予稿集(CD-ROM) 2023)
Realization of the new kilogram based on the Planck constant
(日本分析化学会有機微量分析研究懇談会・計測自動制御学会力学量計測部会合同シンポジウム講演要旨集 2023)
