| Project/Area Number |
25610143
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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 | Japan Agency for Marine-Earth Science and Technology |
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Principal Investigator |
Asakawa Kenichi 国立研究開発法人海洋研究開発機構, 海洋工学センター, シニアスタッフ (40344288)
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| Co-Investigator(Renkei-kenkyūsha) |
UEKI Iwao 国立研究開発法人海洋研究開発機構, 地球環境観測研究開発センター, グループリーダー代理 (60371712)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
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| Keywords | ヘテロダイン干渉計 / ダブルパス干渉計 / HeNeレーザ / 半導体レーザ / 地球温暖化 / 海洋観測 / 塩分 / 大洋循環 / 光塩分センサ / 海洋 |
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| Outline of Final Research Achievements |
The object of this project is to show the possibility to realize an optical salinometer having high resolution and stability. First, we built a heterodyne double-pass interferometer with HeNe laser as a light source and evaluated its basic performance. As a result, it was confirmed that the temperature stability is improved by more than an order of magnitude, compared with the Michelson interferometer. Furthermore we incorporated a semiconductor laser as a light source. Although we could obtain interferometer output with sufficient signal to noise, it revealed that there is a problem with the lock-in amplifier for performing the heterodyne detection. We are going to try heterodyne detection using a computer without using the lock-in amplifier.
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