| Project/Area Number |
25630170
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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 |
Measurement engineering
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| Research Institution | Tokyo University of Agriculture and Technology |
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Principal Investigator |
TANAKA YOSUKE 東京農工大学, 工学(系)研究科(研究院), 准教授 (20283343)
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| Project Period (FY) |
2013-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2013: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
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| Keywords | 二光子吸収 / 分光計測 / 距離計測 / 非線形ヘテロダイン検波 / 二光子吸収応答 / 光非線形ヘテロダイン / 分光 |
|---|
| Outline of Final Research Achievements |
In this study, we have proposed and confirmed the principle of "nonlinear optical heterodyne detection" based on nonlinear output of a photodetector. We also have investigated its applications. The proposed method is expected to realize wide-band, polarization-independent, and high-resolution spectroscopy. We have confirmed the principle by sensitively detecting the spectra of a light transmitted from a sample. Furthermore, we have got an idea of applying the method to distance measurement. We have detected the reflection point at the end of 50-km optical fiber. We have also measured a small displacement with this method. These techniques are applicable to measurement of refractive index change and concentration change for a sample. In this study, we have successfully confirmed the effectiveness of the proposed method.
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