Interrogating the temporal coherence of EUV frequency combs with highly charged ions

Abstract

A scheme to infer the temporal coherence of EUV frequency combs generated from intra-cavity high-order harmonic generation is put forward. The excitation dynamics of highly charged Mg-like ions, interacting with EUV pulse trains featuring different carrier-envelope-phase fluctuations, are simulated. While demonstrating the microscopic origin of the macroscopic equivalence between excitations induced by pulse trains and continuous-wave lasers, we show that the coherence time of the pulse train can be determined from the spectrum of the excitations. The scheme will provide a verification of the comb temporal coherence at time scales several orders of magnitude longer than current state of the art, and at the same time will enable high-precision spectroscopy of EUV transitions with a relative accuracy up to $\delta \omega /\omega \sim 10^{-17}$.

arXiv comment6 pages, 3 figures and 1 table

References in corpus (26)

• Search for New Physics with Atoms and Molecules
• Frequency comb spectroscopy
• 20 years of developments in optical frequency comb technology and applications
• 1.5 $\mu$m lasers with sub 10 mHz linewidth
• Direct Frequency Comb Spectroscopy in the Extreme Ultraviolet
• A laser frequency comb that enables radial velocity measurements with a precision of 1 cm s${}^{-1}$
• Highly charged ions: optical clocks and applications in fundamental physics
• Energy of the ${}^{229}$Th nuclear clock transition
• VUV frequency combs from below-threshold harmonics
• Enhanced laboratory sensitivity to variation of the fine-structure constant using highly-charged ions
• Probing new light force-mediators by isotope shift spectroscopy
• Extreme ultraviolet frequency comb metrology
• Coherent laser spectroscopy of highly charged ions using quantum logic
• Phase-matched extreme-ultraviolet frequency-comb generation
• Extreme Ultraviolet Radiation With Coherence Time Greater Than 1 s
• The Heidelberg compact electron beam ion traps
• XUV Frequency Combs via Femtosecond Enhancement Cavities
• Optical transitions in highly-charged californium ions with high sensitivity to variation of the fine-structure constant
• Full phase stabilization of a Yb:fiber femtosecond frequency comb via high-bandwidth transducers
• Ramsey-comb spectroscopy with intense ultrashort laser pulses
• Detection of the $5p-4f$ orbital crossing and its optical clock transition in Pr${}^{9+}$
• A cryogenic radio-frequency ion trap for quantum logic spectroscopy of highly charged ions
• Broadband high-resolution x-ray frequency combs
• Dynamic steady-state of periodically-driven quantum systems
• High-Precision Ramsey-Comb Spectroscopy Based on High-Harmonic Generation
• X-ray frequency combs from optically controlled resonance fluorescence

Cited by in corpus (5)

• XUV frequency comb operation in an astigmatism-compensated enhancement cavity
• Ultrastable optical, XUV and soft-x-ray clock transitions in open-shell highly charged ions
• High-brilliance ultra-narrow-band x-rays via electron radiation in colliding laser pulses
• Cold highly charged ions in a radio-frequency trap with superconducting magnetic shielding
• Periodic table for highly charged ions