Infrared double optical gating for generating submicrojoule isolated attosecond pulses

Abstract

We experimentally demonstrate an infrared two-color polarization gating scheme for generating an intense isolated attosecond pulse using the multicycle laser. The output flux by the generalized infrared double optical gating was evaluated to be approximately 0.3 μJ/pulse, which is the highest value achieved by using the double optical gating method. The obtained submicrojoule continuum harmonic spectrum supports the generation of a pulse duration of sub-500 as.