Development of a cavity-enhanced phase-matched coherent anti-Stokes Raman spectroscopy

• Project/Area Number: 26620120
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Analytical chemistry
• Research Institution: Kyushu University
• Principal Investigator: Zaitsu Shin-ichi 九州大学, 工学(系)研究科(研究院), 准教授 (60423521)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2014: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
• Keywords: 共振器増強分光 / コヒーレント反ストークスラマン散乱 / ガス分析 / 共振器分光 / 放射性同位体 / 極微量分析 / 放射線同位体

Outline of Final Research Achievements

Cavity-enhanced phase-matched coherent anti-Stokes Raman spectroscopy (CARS) for a novel tool to improve a molecular detection sensitivity of conventional intracavity Raman spectroscopy has been developed. We found an issue in the stability of a cavity resonant condition when both hydrogen and inert gas are filled in the cavity chamber. To stabilize the cavity resonant condition, a feedback control system for two beams having different wavelengths (fundamental: Ti:sapphire laser and Stokes: ECLD). This work will contribute to high-sensitive detection of radio-active hydrogen isotopes based on a phase-matched CARS technique.

Research Products

• [Journal Article] All-Optical Continuous-Wave Phase-Matched Molecular Optical Modulator (2016)
  • Author(s): S. Zaitsu, H. Izaki, T. Tsuchiya, T. Imasaka
  • Journal Title: Scientific Reports Volume: 6 Issue: 1 Pages: 20298-20298
  • DOI: 10.1038/srep20908
  • Peer Reviewed / Open Access
• [Journal Article] Continuous-wave anti-Stokes Raman laser based on phase-matched nondegenerate four-wave mixing (2015)
  • Author(s): Shin-ichi Zaitsu, Totaro Imasaka
  • Journal Title: Optics Ltters Volume: 40 Issue: 1 Pages: 73-76
  • DOI: 10.1364/ol.40.000073
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] Development of a portable optical cavity to enhance 1-GHz mode-locked laser pulses for broadband absorption spectroscopy (2016)
  • Author(s): Yutaro Ito, Shin-ichi Zaitsu, Totaro Imasaka
  • Organizer: PITTCON 2016
  • Place of Presentation: Georgia World Congress Center, Atlanta, USA
  • Year and Date: 2016-03-06
  • Int'l Joint Research
• [Presentation] 広帯域吸収分光法のための1 GHz繰り返しモード同期レーザー増強共振器の開発 (2016)
  • Author(s): 伊藤佑太郎、財津慎一、今坂藤太郎
  • Organizer: レーザー学会学術講演会第36回年次大会
  • Place of Presentation: 名城大学
  • Year and Date: 2016-01-09
• [Presentation] Sideband generation at a frequency of larger than 10 THz based on molecular modulation of a continuous-wave laser (2015)
  • Author(s): Shin-ichi Zaitsu and Totaro Imasaka
  • Organizer: Nonlinear Optics (NLO)
  • Place of Presentation: Kaua'i Marriott Resort on Kalapaki Beach , Kauai, Hawaii, USA
  • Year and Date: 2015-07-26
  • Int'l Joint Research
• [Presentation] 連続発振光に対する分子光学変調 (2015)
  • Author(s): 財津慎一、今坂藤太郎
  • Organizer: レーザー学会学術講演会第35回年次大会
  • Place of Presentation: 東海大学
  • Year and Date: 2015-01-10
• [Presentation] 連続発振光の分子光学変調における共振器位相整合 (2014)
  • Author(s): 財津慎一、今坂藤太郎
  • Organizer: 第75回応用物理学会学術講演会
  • Place of Presentation: 北海道大学
  • Year and Date: 2014-09-18