Title :
Autocorrelation measurement of sub 10-fs high-order harmonics at 42 eV
Author :
Hasegawa, Hirokazu ; Nabekawa, Yasuo ; Midorikawa, Katsumi
Author_Institution :
Laser Technol. Lab., RIKEN, Wako, Japan
Abstract :
In this paper, we report the pulse width measurement of the 27th harmonic having a photon energy of 42 eV, which is the highest photon energy inducing nonlinear process, by autocorrelation technique. The two-photon double ionization of He is used as the nonlinear process for autocorrelation. The pulse duration of 8 fs is obtained with the pump pulse of 20 fs.
Keywords :
helium; optical correlation; optical harmonic generation; optical variables measurement; photoionisation; two-photon processes; 10 fs; 20 fs; 42 eV; 8 fs; He; autocorrelation measurement; high-order harmonics; multiharmonic generation; multiphoton process; nonlinear process; pulse duration; two-photon double ionization; Autocorrelation; Delay; Energy measurement; Helium; Ionization; Nonhomogeneous media; Optical pulse generation; Optical pulses; Pulse measurements; Space vector pulse width modulation;
Conference_Titel :
Quantum Electronics and Laser Science Conference, 2005. QELS '05
Print_ISBN :
1-55752-796-2
DOI :
10.1109/QELS.2005.1549066
