1.1. Background This paper gives the complete 2006 CODATA self-consistent set of
recommended values of the fundamental physical constants and describes in detail the …

Guiding light through hollow optical waveguides has opened the field of photonics to the
investigation of non-solid materials that have all the convenience of integrated optics. Of …

The remarkable precision of frequency-comb (FC) lasers is transferred to the extreme
ultraviolet (XUV, wavelengths shorter than 100 nm), a frequency region previously not …

Optical frequency standards based on single trapped ions or ensembles of neutral atoms
have recently demonstrated stability and accuracy superior to that of the current generation …

For more than 50years, Charlotte Moore's compilation of atomic energy levels and its
subsequent revisions have been the standard source of reference data for the spectra of …

A review of recent experiments involving a newly developed Pound-Drever-Hall-locked
frequency-stabilized cavity ring-down spectroscopy (PDH-locked FS-CRDS) system is …

A comparison of precision frequency measurements to quantum electrodynamic (QED)
theoretical predictions can be used to test theory and to obtain information regarding …

Since the turn of the millennium, the development and commercial availability of optical
frequency combs has led to a steadily increase of worldwide installed frequency combs and …

A frequency comb generated by a 167 MHz repetition frequency erbium-doped fiber ring
laser using a carbon nanotube saturable absorber is phase-stabilized for the first time …

Much discussion in relativistic atomic physics and quantum optics has related to the
interaction of gauge and perturbation of the Hamiltonian or Dirac operator. It has been …