Few-cycle Yb laser source at 20 kHz using multidimensional solitary states in hollow-core fibers

We demonstrate ultrashort pulse compression from 300 fs down to 17 fs at a repetition rate of 20 kHz and 160-mu J output pulse energy (3.2 W of average power) using multidimensional solitary states (MDSS) in a 1-meter hollow-core fiber (HCF) filled with N2O. Under static pressure, thermal limitations at this repetition rate annihilate the MDSS with suppression of spectral broadening. The results obtained in differential pressure configuration mitigate thermal effects and significantly increase the range of repetition rate over which MDSS can be used to compress sub-picosecond laser pulses. (C) 2022 Optica Publishing Group

Automated summary

In this study, ultrashort pulse compression from 300 fs to 17 fs was achieved using multidimensional solitary states (MDSS) in a 1-meter hollow-core fiber (HCF) filled with N2O. The thermal limitations at this repetition rate were mitigated by using a differential pressure configuration, resulting in increased range of repetition rate for MDSS-based compression of sub-picosecond laser pulses.