2013 Fiscal Year Final Research Report
Development of an ultra-stable laser system using a cryogenic optical cavity for optical lattice clocks
| Project/Area Number |
22244049
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Atomic/Molecular/Quantum electronics
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| Research Institution | The University of Tokyo |
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Principal Investigator |
ASO Yoichi 東京大学, 理学(系)研究科(研究院), 助教 (10568174)
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| Co-Investigator(Kenkyū-buntansha) |
KATORI Hidetoshi 東京大学, 大学院工学系研究科, 教授 (30233836)
HONG Feng-lei 産業技術総合研究所, 計測標準研究部門, 研究科長 (10260217)
LI Ying 情報通信研究機構, 電磁波計測研究所, 主任研究員 (30415848)
TSUBONO Kimio 東京大学, 大学院理学系研究科, 名誉教授 (10125271)
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| Co-Investigator(Renkei-kenkyūsha) |
TAKAMOTO Masao 理化学研究所, 香取量子計測研究室, 研究員 (30401144)
SUZUKI Toshikazu 高エネルギー加速器研究機構, 超伝導低温工学センター, 教授 (20162977)
MIYOKI Shinji 東京大学, 宇宙線研究所, 准教授 (20302680)
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| Project Period (FY) |
2010-04-01 – 2013-03-31
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| Keywords | 量子エレクトロニクス / 周波数標準 |
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| Research Abstract |
The main objective of this research was to realize an ultra-stable laser system to be used as a local oscillator for optical lattice clock, which is one of the most promising candidates for the next generation time-frequency standard. Thermal noise of a reference cavity is the main culprit for limiting the stability of a laser locked to the cavity. Therefore, we planned to build a cryogenic cavity made of mono-crystalline silicon cooled down to 3.5K.
As a result of our research, we were able to successfully operate the silicon cavity at 3.5K. An in-loop measurement of the fractional frequency fluctuation is about 10 to the -18th at 1 second.
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[Journal Article] "Prospects for frequency comparison of Sr and Hg optical lattice clocks toward 10^<-18> uncertainties,"in Frequency Control Symposium (FCS)2012
Author(s)
H. Katori, M. Takamoto, T. Takano, I. Ushijima, T. Ohkubo, K. Yamanaka, N. Ohmae, Y. Aso, A. Shoda, T. Ushiba, P. Thoumany, M. Das, B. T. R. Christensen, and T. Akatsuka
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Journal Title
2012 IEEE International
Pages: 1-6
DOI
Peer Reviewed
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