Optical two-way time and frequency transfer over free space
Fabrizio R. Giorgetta,William C. Swann,Laura C. Sinclair,Esther Baumann,Ian Coddington,Nathan R. Newbury +5 more
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Using two-way exchange between coherent frequency combs, each phase-locked to the local optical oscillator, optical time-frequency transfer is demonstrated in free space across a 2-km-long link, with a timing deviation of 1 fs, a residual instability below 10−18 at 1,000 s and systematic offsets below 4 × 10−19 as discussed by the authors.Abstract:
Using two-way exchange between coherent frequency combs, each phase-locked to the local optical oscillator, optical time–frequency transfer is demonstrated in free space across a 2-km-long link, with a timing deviation of 1 fs, a residual instability below 10−18 at 1,000 s and systematic offsets below 4 × 10−19.read more
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Journal ArticleDOI
An optical lattice clock with accuracy and stability at the 10 −18 level
Benjamin Bloom,Benjamin Bloom,Travis Nicholson,Travis Nicholson,Jason Williams,Jason Williams,Jason Williams,Sara Campbell,Sara Campbell,Michael Bishof,Michael Bishof,Xin Zhang,Xin Zhang,Wei Zhang,Wei Zhang,Sarah L. Bromley,Sarah L. Bromley,Jun Ye,Jun Ye +18 more
TL;DR: This work demonstrates a many-atom system that achieves an accuracy of 6.4 × 10−18, which is not only better than a single-ion-based clock, but also reduces the required measurement time by two orders of magnitude.
Journal ArticleDOI
20 years of developments in optical frequency comb technology and applications
TL;DR: This review takes a tutorial approach to illustrate how 20 years of source development and technology has facilitated the journey of optical frequency combs from the lab into the field, and a view to the future with these technologies.
Journal ArticleDOI
Ultralow-noise mode-locked fiber lasers and frequency combs: principles, status, and applications
Jungwon Kim,Youjian Song +1 more
TL;DR: It is reached the point where the residual carrier–envelope-offset phase jitter and pulse timing jitter performance of such laser sources can be fully optimized to the unprecedented levels of attoseconds regime.
Journal ArticleDOI
Optical frequency combs: Coherently uniting the electromagnetic spectrum.
TL;DR: Development and refinements of stable, self-referenced optical frequency combs that span the microwave to optical wavelengths have been reviewed, providing an overview of where they are finding application, from precision timing to high-resolution spectroscopy and imaging, ranging, and navigation.
Journal ArticleDOI
Invited Article: A compact optically coherent fiber frequency comb
Laura C. Sinclair,Jean-Daniel Deschenes,Lindsay Sonderhouse,William C. Swann,Isaac H. Khader,Esther Baumann,Nathan R. Newbury,Ian Coddington +7 more
TL;DR: It is shown that this phase-slip free operation follows the fundamental limit set by the SNR of the control signals, which should enable a wide-range of applications beyond the laboratory.
References
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The fundamental constants and their variation: observational and theoretical status
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Frequency Comparison of Two High-Accuracy Al+ Optical Clocks
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Rapid and precise absolute distance measurements at long range
TL;DR: In this paper, the authors demonstrate a coherent laser ranging system that combines the advantages of time-of-flight and interferometric approaches to provide absolute distance measurements, simultaneously from multiple reflectors, and at low power.
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Generation of ultrastable microwaves via optical frequency division
Tara M. Fortier,Matthew S. Kirchner,Franklyn Quinlan,Jacob M. Taylor,J. C. Bergquist,Till Rosenband,Nathan D. Lemke,Andrew D. Ludlow,Yanyi Jiang,Christopher W. Oates,Scott A. Diddams +10 more
TL;DR: In this paper, a microwave generator based on a high-Q optical resonator and a frequency comb functioning as an optical-to-microwave divider was demonstrated, with a fractional frequency instability of ≤ 8 × 10−16 at 1 s.