Quasi-phase matching of high harmonics driven by mid-IR: toward the efficiency drop compensation

This paper presents a detailed investigation of the high-order harmonics generation quasi-phase matching in a series of gas jets interacting with a two-color laser field formed by the fundamental and the second harmonics of a mid-IR laser source. A quadratic growth of the enhanced harmonics efficiency as a function of a laser wavelength is presented. A power growth of the enhanced harmonics efficiency as a function of the width of the gas jets is also demonstrated. A simple relation connecting the position of the enhanced harmonics and the macroparamaters of the gas jets is introduced. Physical mechanisms lying behind the observed phenomena are also discussed.

Перевод пока недоступен