Frequency-swept discrete Fourier transform spectroscopy ~demonstration and application in THz and near-infrared region~

2016 Fiscal Year Final Research Report

• Project/Area Number: 26246031
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Optical engineering, Photon science
• Research Institution: The University of Tokushima
• Principal Investigator: YASUI TAKESHI 徳島大学, 大学院理工学研究部, 教授 (70314408)
• Co-Investigator(Kenkyū-buntansha): 岩田 哲郎 徳島大学, ソシオテクノサイエンス研究部, 教授 (50304548) ; 橋本 守 大阪大学, 基礎工学研究科, 准教授 (70237949) ; 木戸口 善行 徳島大学, ソシオテクノサイエンス研究部, 教授 (70294717) ; 埴淵 昌毅 徳島大学, 大学院医歯薬学研究部, 准教授 (80335794)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: フーリエ変換分光 / テラヘルツ分光 / 赤外分光 / ガス分析

Outline of Final Research Achievements

In this research, we demonstrated improved spectral resolution by overcoming the time window size limitation using a mode-locked terahertz (THz) or near-infrared (NIR) pulse train as precisely periodic pulsed radiation in discrete Fourier transform spectroscopy (dFTS). Since infinitesimal resolution can be achieved at harmonic components of its repetition frequency 1/T when the time window size is exactly matched to the repetition period T, a combination of dFTS with a spectral interleaving technique achieves a spectral resolution only limited by the spectral interleaving interval.

Free Research Field

光コム計測、テラヘルツ計測、非線形光学顕微鏡