Send to

Choose Destination
See comment in PubMed Commons below
Phys Rev Lett. 2007 Mar 23;98(12):123904. Epub 2007 Mar 23.

Probe of high-order harmonic generation in a hollow waveguide geometry using counterpropagating light.

Author information

JILA and Department of Physics University of Colorado at Boulder, Boulder, Colorado 80309, USA.


We use counterpropagating light to directly observe the coherent buildup of high harmonic generation in a hollow waveguide geometry. We measure, for the first time, coherence lengths for high photon energies that cannot be phase matched using conventional approaches. We also probe the transition through phase matching, the ionization level at which different harmonic orders are generated, and the change in the coherence length as the driving laser is depleted. These results directly prescribe the optimal structures or pulse trains required for implementing quasiphase matching.

PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for American Physical Society
    Loading ...
    Support Center