论文信息 - Ionization of noble gases with pulses directly from a laser oscillator.

Ionization of noble gases with pulses directly from a laser oscillator.

A Ti:sapphire oscillator with an extended cavity generates pulses with 0.5 microJ energy at a repetition rate of 6 MHz and pulse durations of 50 fs. Tight focusing creates peak intensities exceeding 10(14) W/cm2, which is sufficient for ionizing helium, a nonlinear process where at least 17 photons are absorbed simultaneously.

[1] Herwig Kogelnik,et al. Off-Axis Paths in Spherical Mirror Interferometers , 1964 .

[2] Ferenc Krausz,et al. Approaching the microjoule frontier with femtosecond laser oscillators , 2005 .

[3] Alma Fernandez,et al. Approaching the microjoule frontier with femtosecond laser oscillators: theory and comparison with experiment , 2005 .

[4] Andy Steinmann,et al. High-peak-power pulses from a cavity-dumped Yb:KY(WO4)2 oscillator. , 2005, Optics letters.

[5] J. Fujimoto,et al. Generation of 150-nJ pulses from a multiple-pass cavity Kerr-lens mode-locked Ti:Al2O3 oscillator. , 2003, Optics letters.

[6] A. Rudenko,et al. Reaction microscopes applied to study atomic and molecular fragmentation in intense laser fields: non-sequential double ionization of helium , 2004 .

[7] A Poppe,et al. Chirped-pulse oscillators: a route to high-power femtosecond pulses without external amplification. , 2004, Optics letters.

[8] J G Fujimoto,et al. Generation of 90-nJ pulses with a 4-MHz repetition-rate Kerr-lens mode-locked Ti:Al(2)O(3) laser operating with net positive and negative intracavity dispersion. , 2001, Optics letters.

[9] Joachim Ullrich,et al. Recoil-ion and electron momentum spectroscopy: reaction-microscopes , 2003 .