Robust fiber-based frequency synchronization system immune to strong temperature fluctuation

Xi Zhu; Bo Wang; Yichen Guo; Yibo Yuan; Romeo Gamatham; Bruce Wallace; Keith Grainge; Lijun Wang

doi:doi:10.3788/COL201816.010605

Chinese Optics Letters, 2018, 16 (1): 010605, Published Online: Jul. 16, 2018

Robust fiber-based frequency synchronization system immune to strong temperature fluctuation Download： 732次

Xi Zhu ^1,2Bo Wang ^1,*Yichen Guo ¹Yibo Yuan ²Romeo Gamatham ³Bruce Wallace ³Keith Grainge ⁴Lijun Wang ^1,2

Author Affiliations

¹ State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University, Beijing 100084, China

² Department of Physics, Tsinghua University, Beijing 100084, China

³ SKA South Africa, Blend on Baker, Rosebank 2196, Johannesburg, South Africa

⁴ Jodrell Bank Centre for Astrophysics, Alan Turing Building, School of Physics & Astronomy, The University of Manchester, Oxford Road, Manchester M13 9PL, UK

Figures & Tables

Fig. 1. (Color online) Frequency dissemination stability result with and without phase-noise compensation through overhead fiber at the SKA South African site.

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Fig. 2. Schematic diagram of the harmonic reference frequency synchronization scheme.

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Fig. 3. (Color online) (a) Ambient temperature of the fiber link fluctuating 10°C, 20°C, 30°C, and 40°C per day. (b) Measured frequency dissemination stability with strong temperature fluctuation.

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Fig. 4. Schematic diagram of non-harmonic precision reference frequency synchronization scheme. 1fa, 1 GHz + 130 Hz signal phase-locked to OCXO; 1fb, 1 GHz−130 Hz signal phase-locked to OCXO.

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Fig. 5. (Color online) Measured frequency dissemination stabilities of non-harmonic system for 50 km distance with temperature fluctuating 40°C/day and 20°C/h.

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Xi Zhu, Bo Wang, Yichen Guo, Yibo Yuan, Romeo Gamatham, Bruce Wallace, Keith Grainge, Lijun Wang. Robust fiber-based frequency synchronization system immune to strong temperature fluctuation[J]. Chinese Optics Letters, 2018, 16(1): 010605.

Robust fiber-based frequency synchronization system immune to strong temperature fluctuation Download： 732次

Fig. 1. (Color online) Frequency dissemination stability result with and without phase-noise compensation through overhead fiber at the SKA South African site.

Fig. 2. Schematic diagram of the harmonic reference frequency synchronization scheme.

Fig. 3. (Color online) (a) Ambient temperature of the fiber link fluctuating 10°C, 20°C, 30°C, and 40°C per day. (b) Measured frequency dissemination stability with strong temperature fluctuation.

Fig. 4. Schematic diagram of non-harmonic precision reference frequency synchronization scheme. 1fa, 1 GHz + 130 Hz signal phase-locked to OCXO; 1fb, 1 GHz−130 Hz signal phase-locked to OCXO.

Fig. 5. (Color online) Measured frequency dissemination stabilities of non-harmonic system for 50 km distance with temperature fluctuating 40°C/day and 20°C/h.

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Robust fiber-based frequency synchronization system immune to strong temperature fluctuation Download： 732次

Fig. 1. (Color online) Frequency dissemination stability result with and without phase-noise compensation through overhead fiber at the SKA South African site.

Fig. 2. Schematic diagram of the harmonic reference frequency synchronization scheme.

Fig. 3. (Color online) (a) Ambient temperature of the fiber link fluctuating 10°C, 20°C, 30°C, and 40°C per day. (b) Measured frequency dissemination stability with strong temperature fluctuation.

Fig. 4. Schematic diagram of non-harmonic precision reference frequency synchronization scheme. 1fa, 1 GHz + 130 Hz signal phase-locked to OCXO; 1fb, 1 GHz−130 Hz signal phase-locked to OCXO.

Fig. 5. (Color online) Measured frequency dissemination stabilities of non-harmonic system for 50 km distance with temperature fluctuating 40°C/day and 20°C/h.

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