Development of Scanless Fourier Spectrometer Using an Optical Frequency Comb

2023 Fiscal Year Final Research Report

• Project/Area Number: 20K15189
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 30020:Optical engineering and photon science-related
• Research Institution: The University of Electro-Communications
• Principal Investigator: Iwakuni Kana 電気通信大学, レーザー新世代研究センター, 准教授 (80837047)
• Project Period (FY): 2020-04-01 – 2024-03-31
• Keywords: 光コム / 分子分光 / フーリエ分光

Outline of Final Research Achievements

An optical comb is a pulse laser that has a comb-like spectrum with equally spaced oscillation modes. Various spectroscopic techniques have been developed because optical combs can be used as light sources to measure broadband and high-resolution spectra in a short time. In Fourier spectroscopy, the light source is divided into two, or two light sources are used to interfere with each other, and the obtained interference signal is Fourier transformed to obtain a spectrum. In this study, we developed a new Fourier spectrometer using an optical comb as a light source.

Free Research Field

光エレクトロニクス

Academic Significance and Societal Importance of the Research Achievements

光コムを用いた分光手法としては高分散素子を用いた手法があるが特殊な光学素子が必要になる。また、フーリエ分光の一種であるデュアルコム分光法は光源となる2台の光コムが相対的に安定である必要があり、装置や実験手順が煩雑になる。本研究で目指すのはスキャンレスなマイケルソン干渉計を用いた分光計で上記手法よりも扱いやすく、光コムに不慣れな場合でも分光実験に活用できると期待される。