Phys. Rev. Lett. 88, 193902 (2002) [4 pages]Measurement of the Intensity-Dependent Atomic Dipole Phase of a High Harmonic by Frequency-Resolved Optical GatingReceived 5 September 2001; published 26 April 2002 The temporal profile and phase of the fifth harmonic of a Ti:sapphire laser were fully characterized by two-photon ionization frequency-resolved optical gating technique for the first time. The fifth harmonic was found to have negative chirp and the pulse compression was demonstrated. The negative chirp is well explained by using a zero-range potential model. This technique is scalable to extreme ultraviolet (XUV) and soft x-ray regions by using currently available light sources, making it possible to measure the pulse duration and phase of vacuum ultraviolet, XUV, and soft x-ray pulses. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.88.193902
DOI:
10.1103/PhysRevLett.88.193902
PACS:
42.65.Re, 32.80.Rm, 42.65.Ky
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