Chinese Journal of Quantum Electronics, Volume. 21, Issue 2, 139(2004)
History,present situation and future of optical frequency standard and optical frequency measurements
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