@article{11800,
  author = {R. Jones and K. Moll and M. Thorpe and Jun Ye},
  title = {Phase-coherent Frequency Combs in the Vacuum Ultraviolet via High-Harmonic Generation inside a Femtosecond Enhancement Cavity},
  abstract = {We demonstrate the generation of phase-coherent frequency combs in the vacuum utraviolet spectral region. The output from a mode-locked laser is stabilized to a femtosecond enhancement cavity with a gas jet at the intracavity focus. The resulting high-peak power of the intracavity pulse enables efficient high-harmonic generation by utilizing the full repetition rate of the laser. Optical-heterodyne-based measurements reveal that the coherent frequency comb structure of the original laser is fully preserved in the high-harmonic generation process. These results open the door for precision frequency metrology at extreme ultraviolet wavelengths and permit the efficient generation of phase-coherent high-order harmonics using only a standard laser oscillator without active amplification of single pulses.},
  year = {2005},
  journal = {Physical Review Letters},
  volume = {94},
  month = {2005-05},
  issn = {0031-9007},
  doi = {10.1103/PhysRevLett.94.193201},
}