Broadband UV Supercontinuum Generation by Three-Color Ionizing Laser Pulses

We theoretically investigated the properties of the ultraviolet secondary radiation generated under the action of three-color ionizing pulses obtained from parametric light generators. We show that the combination components in the spectrum of electron currents generated under the action of such three-color pulses can form a strictly exponentially decreasing sequence. For moderately short pump pulse durations (30 fs at 800 nm main field) with the use of this effect, it is possible to generate a smooth broadband supercontinuum in the 800-100 nm range.

Automated summary

We theoretically examined the features of ultraviolet secondary radiation produced by three-color ionizing pulses from parametric light generators. Our findings demonstrate that the combination components in the electron current spectrum generated by these pulses follow a strictly exponential decay sequence. By utilizing this effect with moderately short pump durations (30 fs at 800 nm main field), a smooth broadband supercontinuum in the 800-100 nm range can be generated.