The Time and Frequency Group establishes primary standards for the time and frequency field based on the quantum state of atoms, conducting research to develop and disseminate measurement standards and technology in the field. Based on the atom-based measurement standard technology, the group contributes to the redefinition of the second, and develops core technology to benefit national industries, next-generation communication, the national defense and aerospace industries, as well as the lives and safety of citizens.
Current R&D Projects
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1
Creation and management of the Korea Standard Time
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2
Cesium atomic fountain clock
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3
High-precision and mobile ytterbium optical lattice clock
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4
Chip-scale optical frequency clock
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5
Diamond quantum sensor
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6
Optical frequency measurement and microwave-conversion technology
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7
Low-noise microwave generation and synthesis
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8
On-board and chip-scale atomic clocks
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9
Mobile and portable absolute quantum gravimeter
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10
Development of atom-based quantum sensors and measurement technology
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11
Timescale generation based on atomic clocks
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12
High-precision time synchronization technology
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13
Long-range time transfer technology using satellite and ground waves
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14
Time transfer technology based on optical fiber networks
Recent R&D Highlights
- Year-long operation of the Yb optical lattice clock and the measurement of its absolute frequency
- International comparison of optical clocks between Korea and Japan via satellites
- Timescale generation for KEPCO and eLoran
- Establishment of a low-frequency radio station
- Continuous operation of the Cs fountain clock (95 % per month) and its contribution to UTC(KRIS) and comparison with the optical clock
- Evaluation of the sensitivity of the quantum gravimeter (1×10-9 g/Hz1/2) and a magneto-optical trap on the diffraction grating (atomic temperature 40 μK)
- Chip-scale atomic clock (volume 25 ㎥, power consumption 370 mW, frequency stability 5×10-11@1 s)
Introducing Teams in a Group
Atom-based Quantum Standards Team
The Atom-based Quantum Standards Team pioneers the redefinition of time through the develop of a world-class optical clock. The team conducts research on the development of new standards and sensor technology based on the philosophy of base unit redefinition as well as time traceability. In addition, the developed standards and technology are used to research innovations in standards dissemination.
Key Research Area
- High-precision and mobile ytterbium optical lattice clock
- Chip-scale optical frequency clock
- Diamond quantum sensor
- Optical frequency measurement and segmentation technology
Atom-based Quantum Measurement Team
The Atom-based Quantum Measurement Team is developing an atomic fountain clock to contribute to the national primary frequency standard and International Atomic Time generation. Development projects also include an on-board atomic clock for satellites for the Global Positioning System, a high-sensitivity absolute quantum gravimeter with world-class performance, atom-based quantum sensors, and high-precision quantum measurement technology.
Key Research Area
- Atomic fountain clocks
- Low-noise microwave generation and synthesis
- On-board and chip-scale atomic clocks
- Mobile and portable absolute quantum gravimeter
- Development of atom-based quantum sensors and measurement technology
Time Transfer Team
The Satellite Optical Application Time Synchronization Team conducts research to further advance time standard transfer technology using satellite·optical networks. The team is in the process of developing standard time generation system technology for aeronautics technology.
Key Research Area
- Standard time generation based on atomic clocks
- High-precision time synchronization technology
- Long-range time transfer technology using satellite and ground waves
- Time transfer technology based on optical fiber networks
About Other Groups
