24 October 2017 The ultra-stable microwave based on ultra-stable laser
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Proceedings Volume 10457, AOPC 2017: Laser Components, Systems, and Applications; 1045722 (2017) https://doi.org/10.1117/12.2284763
Event: Applied Optics and Photonics China (AOPC2017), 2017, Beijing, China
Abstract
An ultra-stable microwave based on ultra-stable laser and fiber optical frequency comb (FOFC) is built at the National Institute of Metrology China (NIM). The repetition rate (fr) of FOFC is stabilized by stabilizing the sum of the carrier envelope of set frequency (fceo) of FOFC and the beating frequency between the ultra-stable laser and FOFC. A current feedback with 30 kHz bandwidth and a piezoelectric transducer (PZT) with 1 kHz bandwidth are applied for the feedback locking. The frequency jitter of the stabilized sum frequency is about 4 Hz. The short time stability of fr is calculated better than 1E-14. This ultra-stable microwave will be applied as local oscillator for NIM5 Cs fountain to improve its short term stability.
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Shaoyang Dai, Shaoyang Dai, Fang Fang, Fang Fang, Shiying Cao, Shiying Cao, Nianfeng Liu, Nianfeng Liu, Tianchu Li, Tianchu Li, } "The ultra-stable microwave based on ultra-stable laser", Proc. SPIE 10457, AOPC 2017: Laser Components, Systems, and Applications, 1045722 (24 October 2017); doi: 10.1117/12.2284763; https://doi.org/10.1117/12.2284763
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