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Optical frequency combs: Coherently uniting the electromagnetic spectrum
BACKGROUND The generation and control of coherent electromagnetic waves, such as
those provided by electronic oscillators in the radio frequency domain or lasers in the optical …
those provided by electronic oscillators in the radio frequency domain or lasers in the optical …
20 years of developments in optical frequency comb technology and applications
Optical frequency combs were developed nearly two decades ago to support the world's
most precise atomic clocks. Acting as precision optical synthesizers, frequency combs …
most precise atomic clocks. Acting as precision optical synthesizers, frequency combs …
Frequency ratio measurements at 18-digit accuracy using an optical clock network
Nature, 2021 - nature.com
Atomic clocks are vital in a wide array of technologies and experiments, including tests of
fundamental physics. Clocks operating at optical frequencies have now demonstrated …
fundamental physics. Clocks operating at optical frequencies have now demonstrated …
ESPRESSO at VLT-On-sky performance and first results
Context. ESPRESSO is the new high-resolution spectrograph of ESO's Very Large
Telescope (VLT). It was designed for ultra-high radial-velocity (RV) precision and extreme …
Telescope (VLT). It was designed for ultra-high radial-velocity (RV) precision and extreme …
An optical atomic clock based on a highly charged ion
Optical atomic clocks are the most accurate measurement devices ever constructed and
have found many applications in fundamental science and technology,–. The use of highly …
have found many applications in fundamental science and technology,–. The use of highly …
Quantum-Logic Clock with a Systematic Uncertainty below
We describe an optical atomic clock based on quantum-logic spectroscopy of the S 0 1↔ P
3 0 transition in Al+ 27 with a systematic uncertainty of 9.4× 10-19 and a frequency stability …
3 0 transition in Al+ 27 with a systematic uncertainty of 9.4× 10-19 and a frequency stability …
Demonstration of 4.8 × 10−17 stability at 1 s for two independent optical clocks
Optical atomic clocks require local oscillators with exceptional optical coherence owing to
the challenge of performing spectroscopy on their ultranarrow-linewidth clock transitions …
the challenge of performing spectroscopy on their ultranarrow-linewidth clock transitions …
Architecture for the photonic integration of an optical atomic clock
Laboratory optical atomic clocks achieve remarkable accuracy (now counted to 18 digits or
more), opening possibilities for exploring fundamental physics and enabling new …
more), opening possibilities for exploring fundamental physics and enabling new …
Quantum sensing
“Quantum sensing” describes the use of a quantum system, quantum properties, or quantum
phenomena to perform a measurement of a physical quantity. Historical examples of …
phenomena to perform a measurement of a physical quantity. Historical examples of …
Search for ultralight dark matter from long-term frequency comparisons of optical and microwave atomic clocks
We search for ultralight scalar dark matter candidates that induce oscillations of the fine
structure constant, the electron and quark masses, and the quantum chromodynamics …
structure constant, the electron and quark masses, and the quantum chromodynamics …