A pulse width of the 27th harmonic is measured by autocorrelation. The nonlinear process uses two-photon double ionization of He. The pulse duration of 8 fs is obtained with the pump pulse of 20 fs.
© 2005 Optical Society of America
(020.0020) Atomic and molecular physics : Atomic and molecular physics
(020.4180) Atomic and molecular physics : Multiphoton processes
(190.0190) Nonlinear optics : Nonlinear optics
(190.4160) Nonlinear optics : Multiharmonic generation
H. Hasegawa, Y. Nabekawa, and K. Midorikawa, "Autocorrelation Measurement of Sub 10-fs High-Order Harmonics at 42 eV," in Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science and Photonic Applications Systems Technologies, Technical Digest (CD) (Optical Society of America, 2005), paper JTuD5.
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