Development of the polarization-sensitive dual comb spectroscopy

2017 Fiscal Year Final Research Report

• Project/Area Number: 16K13701
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Optical engineering, Photon science
• Research Institution: Keio University
• Principal Investigator: Watanabe Shinichi 慶應義塾大学, 理工学部(矢上), 准教授 (10376535)
• Co-Investigator(Renkei-kenkyūsha): INABA Hajime 国立研究開発法人産業技術総合研究所, 研究グループ長 (70356492) ; OKUBO Sho 国立研究開発法人産業技術総合研究所, 研究員 (30635800)
• Project Period (FY): 2016-04-01 – 2018-03-31
• Keywords: 光周波数コム / デュアルコム分光法 / ファイバーレーザー

Outline of Final Research Achievements

In this project, we developed a high speed, high precision polarization-sensitive dual comb spectroscopy system in the near infrared spectral region. We proposed the original idea of the system as a combination of dual-comb spectroscopy and rotating compensator polarimetry to generate new com lines with polarization information as the frequency sidebands of each comb tooth. We constructed the system and succeeded in determining the polarization information for each optical frequency component constituting the optical frequency comb light source. We also proposed a measurement method and an analysis method to reduce measurement uncertainty. Furthermore, we constructed the original system for future application of the proposed polarization-sensitive dual comb spectroscopy.

Free Research Field

光物性物理学