| Project/Area Number |
15K13571
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Meteorology/Physical oceanography/Hydrology
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| Research Institution | National Institute of Advanced Industrial Science and Technology |
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Principal Investigator |
KAYUKAWA Yohei 国立研究開発法人産業技術総合研究所, 工学計測標準研究部門, 主任研究員 (50371034)
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| Project Period (FY) |
2015-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
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| Keywords | レーザー計測 / 海洋科学 / センサ / 超精密計測 / 光周波数コム / 屈折率 / 海水 / 塩分 / 絶対円分 / 海洋物理 |
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| Outline of Final Research Achievements |
Measuring the absolute salinity of sea water is important to understand the mechanism of oceans. In order to develop a new abosolute-alinity sensing device with refractive index measurement which can be used under water, a precise refractive index measurement technique was developed in this study. The measurement principle is based on spectral a method known as an interference displacement sensor. Interference fringes from the difference between the optical length of a pure water and a sea water cell was observed as a interference spectrum by a optical spectrum analyzer. In the present study, it was shown that the refractive index can be measured precisely by employing an optical frequency comb which has a broad range of optical frequency from 420 nm to 2 um.
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