Chinese Journal of Quantum Electronics, Volume. 21, Issue 2, 139(2004)

History,present situation and future of optical frequency standard and optical frequency measurements

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    The history, present situation and future of optical frequency standards and optical frequency measurements were presented. The uncertainty of optical frequency standards has come up to 10-11 ~ 10-14. In this way, length unit 'meter' became the derived unit of time unit 'second'. Recently, there was a great breakthrough in this field. The unexpected link of femtosecond mode-locked laser and optical frequency measurement technology make a simple relation between microwave standards and optical frequency standards. Frequency measurements get easier and more accurate because of this relation. This is a new brilliancy in metrology and physics.

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    [in Chinese], [in Chinese], [in Chinese]. History,present situation and future of optical frequency standard and optical frequency measurements[J]. Chinese Journal of Quantum Electronics, 2004, 21(2): 139

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    Paper Information

    Received: Feb. 11, 2004

    Accepted: --

    Published Online: May. 15, 2006

    The Author Email: (nieyx@aphy.iphy.ac.cn)

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