The ultra-stable microwave based on ultra-stable laser

被引:2
|
作者
Dai, Shaoyang [1 ]
Fang, Fang [1 ]
Cao, Shiying [1 ]
Liu, Nianfeng [1 ]
Li, Tianchu [1 ]
机构
[1] Natl Inst Metrol, Time & Frequency Div, Beijing, Peoples R China
关键词
Ultra-stable microwave; Ultra-stable laser; Optical frequency comb; OPTICAL FREQUENCY COMB; NOISE;
D O I
10.1117/12.2284763
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
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 (f(r)) of FOFC is stabilized by stabilizing the sum of the carrier envelope offset frequency (f(ceo)) 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.
引用
收藏
页数:4
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