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Opt Lett. 2003 Mar 15;28(6):480-2.

Wave-front phase measurements of high-order harmonic beams by use of point-diffraction interferometry.

Author information

  • 1Department of Physics, Coherent X-Ray Research Center, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea. donggun@mail.kaist.ac.kr

Abstract

We report the wave-front phase measurement of high-order harmonics employing point-diffraction interferometry. The high-order harmonics generated in a gas-filled hollow tube showed excellent spatial coherence over nearly the whole cross section of the harmonic beams. Using this coherent harmonic source in the extreme-ultraviolet-soft-x-ray region, we have demonstrated the operation of a point-diffraction interferometer and measured the wave-front phase of high-order harmonics.

PMID:
12659286
[PubMed]
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