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

Abstract

We demonstrate ultrashort pulse compression from 300 fs down to 17 fs at a repetition rate of 20 kHz and 160-µJ 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.

Mid-infrared pulse generation using multi-plate white-light generation and optical parametric amplification in LiGaS2 crystals

“…Regarding the required generation of seed pulses for DFG, the high-intensity continuum generation in solids using multi-plate pulse compression has advantages in terms of system size and/or handling, compared to the characteristics of continuum generation in gases and hollow-core fibers. [11][12][13][14][15][16][17][18] Additionally, to investigate HHG in various different materials, we require a CEP-stable MIR light source that can be tuned over a wide wavelength range to efficiently induce the corresponding transitions. [19][20][21][22] So far, CEP-stable OPA light sources with white-light generation using multi-plate pulse compression have been developed for wavelengths of about 3 μm and 10 μm using KTiOAsO 4 (KTA) and GaSe crystals, respectively, but a light source for the 5-7 μm region with the same scheme has not yet been reported.…”