About the Chief Scientist
Chen Jingbiao, professor, doctoral supervisor at the Institute of Quantum Electronics, Peking University, and part-time professor at Xidian University, currently serves as deputy director of the Institute of Quantum Electronics, executive director of the Chinese Society for Measurement and member of the Time and Frequency Committee, and member of the National Technical Committee for Time and Frequency Measurement.
Prof. Chen has long been devoted to experiments and theoretical studies related to quantum frequency standards (microwave and optical frequency atomic clocks), new lasers and their applications, and principles and techniques of precision laser spectroscopy. He is an authoritative source on active optical clocks, miniaturized optical clocks, Faraday atomic filters and Faraday lasers, novel lasers and precision laser spectroscopy, and atomic magnetometers. He played a leading role in the 863 Program, 973 Program, international cooperation projects of the Ministry of Science and Technology, major research programs sponsored by the National Natural Science Foundation of China, and major projects of the Ministry of Science and Technology, published more than 150 papers on Chinese and international academic journals, and received 40 international and domestic invention patents. Prof. Chen has a high reputation in the international community for his scientific attainments.
About the Program
The chip-scale atomic clock (CSAC) independently developed by the team led by Prof. Chen integrates state-of-the-art topological photonic crystal laser technology, high-speed electro-optical modulation technology based on the lithium niobate thin film optical chip platform, miniature atomic gas chamber technology, whole machine encapsulation technology, and CSAC microwave chip technology. Compared with other types of microwave atomic clocks, the CSAC is characterized by miniaturization, low power, low cost and high stability, and can realize mass production and application with broader uses of atomic clocks.
In technical aspects, in the program, the in-house developed proprietary topological photonic crystal laser plus the high-speed external modulation technology is employed to offer a combination of benefits like narrow linewidth, high power and full-spectrum laser output; the unique vacuum encapsulation of the whole machine, miniature gas chamber structure, atom injection, anode bonding and deep etching technology all serve to assure stability of atoms, lengthen the lifespan of atoms, reduce vibration and improve the frequency stability of the CSAC as a whole; the in-house developed microwave chip leverages the unique PID algorithm and digital phase sensitive demodulation algorithm to deliver effective temperature control; high-precision microwave phase lock control and fluorescence amplification can ensure stability of the laser output and the output characteristics of the standard frequency. The technical indicators prove to be the world’s best.
