Abstract
We report the generation of high power extreme ultraviolet frequency combs at 154 MHz repetition rate. The XUV combs are characterized by conducting high resolution spectroscopy and observing the heterodyne beats between two independent systems
Highlights
The XUV combs are characterized by conducting high resolution spectroscopy and observing the heterodyne beats between two independent systems
We report on recent advances made in our group [1,2,3] on XUV frequency comb generation via intracavity high order harmonic generation (HHG)
Since HHG is initiated through field ionization, it is typically realized with low repetition rate (< 100 kHz) amplified femtosecond laser systems producing high energy pulses (> 100 μJ), with average powers up to tens of Watts
Summary
We report on recent advances made in our group [1,2,3] on XUV frequency comb generation via intracavity high order harmonic generation (HHG). We have confirmed the frequency comb structure in the XUV by conducting direct frequency comb spectroscopy at 82 nm and 63 nm [1], simultaneously demonstrating a spectroscopic instrument with unrivaled resolution in the XUV. We will discuss these results and further investigation of the coherence of the generated XUV combs by recording heterodyne beats between harmonics from two independent intracavity HHG systems. These heterodyne beats will allow examination of the phases of the XUV light produced through HHG with unprecedented precision
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