Abstract
Attosecond pulse generation is one of the attractive topics in the field of high harmonic generation and ultrafast optics. For the generation of ultrashort pulses in the attosecond regime, precise phase measurement and manipulation are requisite. However, the phase of high harmonics has never been measured. In this paper, we propose the frequency-resolved optical-gating (FROG) technique1 by using two-photon ionization (TPI) for the measurement of the extreme ultraviolet (XUV) ultrashort pulses and demonstrate the phase measurement and compensation of the fifth harmonic of Ti:sapphire (TiS) laser pulses for the first time.
© 2002 Optical Society of America
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