Wave-front phase measurements of high-order harmonic beams by use of point-diffraction interferometry |
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| Authors: | Lee D G Park J J Sung J H Nam C H |
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| Affiliation: | Department of Physics, Coherent X-Ray Research Center, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea. donggun@mail.kaist.ac.kr |
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| 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. |
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