Long-term ultra-precision phase synchronization technique for locking the repetition rate of OFCs based on FLOM-PD |
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| Authors: | ZHOU Weifeng HAO Shijie CHEN Xing ZHANG Wanpeng YUE Zongjie and WUHong |
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| Affiliation: | College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, China;Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Nankai University, Tianjin 300350, China,College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, China;Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Nankai University, Tianjin 300350, China,State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China,College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, China;Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Nankai University, Tianjin 300350, China,College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, China;Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Nankai University, Tianjin 300350, China and College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, China;Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Nankai University, Tianjin 300350, China;Engineering Research Center of Thin Film Optoelectronics Technology, Nankai University, Tianjin 300350, China |
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| Abstract: | Long-term ultra-precision synchronization between optical frequency combs (OFCs) and microwave oscillators is important for various fields, including scientific observation, smart grid, positioning and navigation, etc. Here, a phase-locked loop system based on fiber loop optical-microwave phase detector (FLOM-PD) is proposed to realize the synchronization of the repetition rate of OFCs and rubidium atomic clocks. Firstly, the scheme and locking process of the system are elaborated, then the mathematical model of the system is established, and the feasibility of the scheme is proved by theoretical analysis and experimental verification. After synchronization, the instability of the system reaches 8.69×10-12 at 1 s and 2.94×10-13 at 1 000 s, indicating that the phase synchronization system can achieve ultra-precision and stability of OFCs repetition rate. |
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