Development of underwater monitoring techniques using Raman lidar for exploration of deep-sea resources and environment assessments

• Project/Area Number: 25871083
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Environmental dynamic analysis; Optical engineering, Photon science
• Research Institution: Institute for Laser Technology
• Principal Investigator: SOMEKAWA Toshihiro 公益財団法人レーザー技術総合研究所, その他部局等, 研究員 (00508442)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2014: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000); Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
• Keywords: ラマン分光 / ライダー / CO2 / ラマン / 海底資源探査 / 環境影響評価

Outline of Final Research Achievements

We have examined the applicability of Raman lidar technique as a laser remote sensing tool in water. The Raman technique can be used for measurements of CO2 gas dissolved in water and CO2 bubbles. Also, the effect of seawater on CO2 Raman spectra has been evaluated. We provide further insights into development of compact lidar systems for marine applications. The results show that our technique can be applied to efficient underwater monitoring.

Research Products

• [Journal Article] Raman spectroscopy measurements of CO2 dissolved in water and CO2 bubbles for laser remote sensing in water (2014)
  • Author(s): T. Somekawa, T .Takeuchi, C. Yamanaka, and M. Fujita
  • Journal Title: Proc. of SPIE Volume: 9240 Pages: 92400J-92400J
  • DOI: 10.1117/12.2067088
  • Acknowledgement Compliant
• [Presentation] Raman Spectroscopic Measurements of CO2 Dissolved in Seawater For Laser Remote Sensing in Water (2015)
  • Author(s): T. Somekawa and M. Fujita
  • Organizer: 27th International Laser Radar Conference
  • Place of Presentation: City College of New York campus
  • Year and Date: 2015-07-05 – 2015-07-10
• [Presentation] 水中レーザーリモートセンシングに向けた海水溶存ガスのラマン分光 (2015)
  • Author(s): 染川智弘、藤田雅之
  • Organizer: 第62回応用物理学会春季学術講演会
  • Place of Presentation: 東海大学
  • Year and Date: 2015-03-11
• [Presentation] Raman spectroscopy measurements of CO2 dissolved in water and CO2 bubbles for laser remote sensing in water (2014)
  • Author(s): T. Somekawa, T. Takeuchi, C. Yamanaka, and M. Fujita
  • Organizer: SPIE Remote Sensing 2014
  • Place of Presentation: Amsterdam, Netherlands
  • Year and Date: 2014-09-24
• [Presentation] 水中レーザーリモートセンシングに向けたCO2気泡のラマン分光測定 (2014)
  • Author(s): 染川智弘、竹内智紀、藤田雅之
  • Organizer: 第75回応用物理学会秋季学術講演会
  • Place of Presentation: 北海道大学
  • Year and Date: 2014-09-18
• [Presentation] 水中レーザーリモートセンシングに向けたCO2気泡のラマン分光測定 (2013)
  • Author(s): 染川智弘、竹内智紀、藤田雅之
  • Organizer: 第31回レーザーセンシングシンポジウム
  • Place of Presentation: 神奈川県箱根町／ホテルおかだ
• [Remarks] 公益財団法人レーザー技術総合研究所
  • URL: http://www.ilt.or.jp/