Atomic frequency standards at NICT

T. Ido; M. Fujieda; H. Hachisu; K. Hayasaka; M. Kajita; R. Kojima; M. Kumagai; C. Locke; Y. Li; K. Matsubara; A. Nogami; N. Shiga; A. Yamaguchi; Y. Koyama; M. Hosokawa; Y. Hanado

doi:10.1117/12.892887

12 September 2011 Atomic frequency standards at NICT

T. Ido, M. Fujieda, H. Hachisu, K. Hayasaka, M. Kajita, R. Kojima, M. Kumagai, C. Locke, Y. Li, K. Matsubara, A. Nogami, N. Shiga, A. Yamaguchi, Y. Koyama, M. Hosokawa, Y. Hanado

Author Affiliations +

Proceedings Volume 8132, Time and Frequency Metrology III; 81320D (2011) https://doi.org/10.1117/12.892887
Event: SPIE Optical Engineering + Applications, 2011, San Diego, California, United States

Abstract

Various activities of atomic frequency standards studied in National Institute of Information and Communications Technology (NICT) are briefly reviewed. After BIPM accepted the first cesium fountain clock in NICT as a reference to determine International Atomic Time (TAI), efforts to further reduce the uncertainty of collision shifts are ongoing. A second fountain clock using atomic molasses is being built to enable the operation with less atomic density. Single ion clock using calcium has been pursued for several years in NICT. The absolute frequency measured in 2008 has CIPM to adopt the Ca+ clock transition as a part of the list of radiation (LoR) to realize the meter. Sr lattice clock has started its operation last year. The absolute frequency agreed well with those obtained in other institutes. Study of stable cavities to stabilize clock lasers are also introduced.

Citation Download Citation

T. Ido, M. Fujieda, H. Hachisu, K. Hayasaka, M. Kajita, R. Kojima, M. Kumagai, C. Locke, Y. Li, K. Matsubara, A. Nogami, N. Shiga, A. Yamaguchi, Y. Koyama, M. Hosokawa, and Y. Hanado "Atomic frequency standards at NICT", Proc. SPIE 8132, Time and Frequency Metrology III, 81320D (12 September 2011); https://doi.org/10.1117/12.892887

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available