Ning Zhang, Qian Wang, Weijing Zhao, Qingchen Ji, Rong Wei. Design of Low Phase Noise Microwave Frequency Synthesizer for 85Rb Fountain Clock[J]. Acta Optica Sinica, 2020, 40(10): 1002001
- Acta Optica Sinica
- Vol. 40, Issue 10, 1002001 (2020)
Fig. 1. Diagram of phase detection between quantum system and microwave system in fountain clock
Fig. 2. Influence of LO on stability of fountain clock under different conditions. (a) TC=2.8 s,T=0.56 s, and τp=40 ms; (b) Δν=1 Hz, T=0.56 s, and τp=40 ms
Fig. 3. Chain setup of microwave system of 85Rb fountain clock
Fig. 4. Power spectrum of microwave signal in range of 1 MHz (insert is power spectrum in range of 100 kHz)
Fig. 5. Absolute phase noise of microwave system
Fig. 6. Experimental setup used for measurement of phase noise
Fig. 7. Residual phase noises of some key components in microwave frequency synthesizer
Fig. 8. Phase noise of microwave synthesizer
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