High-accuracy length metrology with self-correction of environmental fluctuation using optical frequency combs.
| Project/Area Number |
25286076
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Optical engineering, Photon science
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| Research Institution | The University of Electro-Communications |
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Principal Investigator |
MINOSHIMA Kaoru 電気通信大学, 情報理工学(系)研究科, 教授 (20358112)
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| Co-Investigator(Kenkyū-buntansha) |
YASUI Takeshi 徳島大学, ソシオテクノサイエンス研究部, 教授 (70314408)
INABA Hajime 国立研究開発法人産業技術総合研究所, 物理計測標準研究部門, 研究グループ長 (70356492)
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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 |
¥18,980,000 (Direct Cost: ¥14,600,000、Indirect Cost: ¥4,380,000)
Fiscal Year 2015: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2014: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2013: ¥10,400,000 (Direct Cost: ¥8,000,000、Indirect Cost: ¥2,400,000)
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| Keywords | 光コム / 距離計測 / 干渉計測 / 空気屈折率 / 超短パルスレーザー / ファイバレーザー / 精密計測 / 省エネ / 干渉計 |
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| Outline of Final Research Achievements |
Air refractive index correction is one of the major sources of uncertainty in length metrology. In this study, high-accuracy length measurement method by use of optical frequency combs was developed and significant improvement in the accuracy of air refractive index correction was achieved. High-precision interferometric measurement method of dispersion relation of air refractive index was developed by using precise frequency control of multi-color combs. Basic technologies for high-accuracy and real-time self-correction by direct use of target optical measurement results has been developed. Ultrahigh-accuracy correction was actually demonstrated by developing the self-evaluation method without relying on the accuracy of air refractive index equation. This study opens up the high-accuracy energy-saving length measurement methods under practical environmental conditions. Developed technique can improve the accuracy of well-established empirical equations for air refractive index.
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Report
(4 results)
Research Products
(30 results)
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[Presentation] 知的テラヘルツ計測2015
Author(s)
安井武史
Organizer
第76回応用物理学会秋季学術講演会
Place of Presentation
名古屋
Year and Date
2015-09-13
Related Report
Invited
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