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Applied Physics B: Lasers and Optics, ISSN 0946-2171, 01/2017, Volume 123, Issue 1, pp. 1 - 5
The absolute frequency of the 87 Sr clock transition measured in 2015 (Jpn J Appl Phys 54:112401, 2015) was reevaluated using an improved frequency link to the... 
Frequency measurement
Journal Article
Scientific Reports, ISSN 2045-2322, 12/2018, Volume 8, Issue 1, pp. 4243 - 12
Time scales consistently provide precise time stamps and time intervals by combining atomic frequency standards with a reliable local oscillator. Optical... 
LATTICE CLOCK | ATOMIC CLOCKS | TIMESCALE | PRIMARY FREQUENCY STANDARDS | UTC | MICROWAVE-CLOCK | MULTIDISCIPLINARY SCIENCES | FOUNTAIN | UNCERTAINTY | LNE-SYRTE | PREDICTION | Standards
Journal Article
Optics Express, ISSN 1094-4087, 04/2017, Volume 25, Issue 8, pp. 8511 - 8523
SI-traceable measurements of optical frequencies using International Atomic Time (TAI) do not require a local primary frequency reference, but suffer from an... 
Journal Article
Nature Photonics, ISSN 1749-4885, 01/2013, Volume 7, Issue 1, pp. 43 - 47
X-ray free-electron lasers(1,2) produce intense femtosecond pulses that have applications in exploring new frontiers in science. The unique characteristics of... 
BEAM | INTERFEROMETRY | PHYSICS, APPLIED | OPTICS | ZONE PLATES | MIRROR | Beams (radiation) | Free electron lasers | Focusing | Optical properties | Preserves | X-rays | Deviation | Density
Journal Article
Applied Physics B, ISSN 0946-2171, 1/2017, Volume 123, Issue 1, pp. 1 - 5
The absolute frequency of the $$^{87}\mathrm{Sr}$$ 87 Sr clock transition measured in 2015 (Jpn J Appl Phys 54:112401, 2015) was reevaluated using an improved... 
Quantum Optics | Engineering, general | Physics, general | Physical Chemistry | Physics | Optics, Lasers, Photonics, Optical Devices
Journal Article
Applied Physics B: Lasers and Optics, ISSN 0946-2171, 01/2017, Volume 123, Issue 1, p. 1
To access, purchase, authenticate, or subscribe to the full-text of this article, please visit this link: http://dx.doi.org/10.1007/s00340-016-6603-9 The... 
Journal Article
Japanese Journal of Applied Physics, ISSN 0021-4922, 11/2015, Volume 54, Issue 11, p. 112401
The absolute frequency of the Sr-87 lattice clock transition was evaluated with an uncertainty of 1.1 x 10(-15) using a frequency link to the international... 
TRANSITION | BASE-LINE | PHYSICS, APPLIED | SR LATTICE CLOCK | ABSOLUTE FREQUENCY | ATOMS | CANCELLATION | ACCURACY | Uncertainty | Lattices | Hydrogen masers | Links | Optical frequency | Oscillators | Clocks
Journal Article
Hyperfine Interactions, ISSN 0304-3843, 6/2019, Volume 240, Issue 1, pp. 1 - 8
We report on the progress of an optical clock based on an indium ion (115In+) sympathetically cooled with a calcium ion (40Ca+) in a linear trap. In our... 
Condensed Matter Physics | Ion trap | Nuclear Physics, Heavy Ions, Hadrons | Optical clock | Sympathetic cooling | Atomic, Molecular, Optical and Plasma Physics | Indium ion | Surfaces and Interfaces, Thin Films | Physics | Magnetic fields | Indium | Uncertainty | Frequency locking | Stability | Calcium isotopes | Optical pumping | Calcium ions
Journal Article
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, ISSN 0885-3010, 12/2016, Volume 63, Issue 12, pp. 2231 - 2236
Journal Article
Optics Express, ISSN 1094-4087, 08/2011, Volume 19, Issue 17, pp. 16498 - 16507
We developed an all-optical link system for making remote comparisons of two distant ultra-stable optical clocks. An optical carrier transfer system based on a... 
FREQUENCY DISSEMINATION | NETWORK | LATTICE CLOCKS | FIBER LINK | STABILITY | COHERENT TRANSFER | TIME | OPTICS
Journal Article
Applied Physics Express, ISSN 1882-0778, 08/2011, Volume 4, Issue 8
Journal Article
Optics Express, ISSN 1094-4087, 09/2012, Volume 20, Issue 20, pp. 22034 - 22041
Optical frequency comparison of the Ca-40(+) clock transition nu(Ca) (S-2(1/2)-(2)D(5/)2, 729nm) against the Sr-87 optical lattice clock transition nu(Sr)... 
TRANSITION | SYSTEM | FIBER | METROLOGY | DECIMAL PLACE | OPTICAL FREQUENCY | ATOMS | LINK | OPTICS | Optical Devices | Time Factors | Humans | Oscillometry - instrumentation | Computer-Aided Design | Oscillometry - methods | Calcium - chemistry | Equipment Design | Strontium - chemistry | Equipment Failure Analysis | Index Medicus
Journal Article
Applied Physics Express, ISSN 1882-0778, 8/2011, Volume 4, Issue 8, pp. 082203 - 082203-3
Fiber-based remote comparison of 87 Sr lattice clocks in 24 km distant laboratories is demonstrated. The instability of the comparison reaches $5\times... 
FREQUENCY TRANSFER | PHYSICS, APPLIED | FIBER LINK
Journal Article
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, ISSN 0885-3010, 06/2018, Volume 65, Issue 6, pp. 973 - 978
Advanced satellite-based frequency transfers by two-way carrier-phase (TWCP) and integer precise point positioning have been performed between the National... 
Time-frequency analysis | Fitting | phase measurement | frequency measurement | Acoustics | Frequency control | Clocks
Journal Article
Applied Physics Express, ISSN 1882-0778, 2/2012, Volume 5, Issue 2, pp. 022701 - 022701-3
We demonstrated transferring the stability of one highly stable clock laser operating at 729 nm to another less stable laser operating at 698 nm. The two... 
Journal Article
IEEE transactions on ultrasonics, ferroelectrics, and frequency control, 10/2016
Journal Article
Proceedings of SPIE - The International Society for Optical Engineering, ISSN 0277-786X, 01/2011, Volume 8132
An 87 Sr-based-optical lattice clock in NICT is compared to that of The University of Tokyo using a 50 km fiber link. In this work, we have demonstrated for... 
Optical fibers | Strontium | Optical lattices | Lattices | Metrology | Links | Telecommunications | Clocks
Journal Article
Proceedings of SPIE, ISSN 0277-786X, 10/2011, Volume 8132, Issue 1, pp. 81320A - 81320A-8
An Sr-based-optical lattice clock in NICT is compared to that of The University of Tokyo using a >50 km fiber link. In this work, we have demonstrated for the... 
Conference Proceeding
2018 Conference on Lasers and Electro-Optics, CLEO 2018 - Proceedings, 08/2018
Conference Proceeding
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