TY  - JOUR
A1  - Mayer, Dennis
A1  - Matthaei, Christian T.
A1  - Heuer, Axel
A1  - Gühr, Markus
T1  - Kagome-fiber prism compressor combination for Yb
BT  - KGW laser pulse compression to sub-40fs
JF  - Journal of optics
N2  - Spectral broadening in hollow-core fibers is an important tool for pulse compression of low-peak power laser pulses, especially for Yb-based lasers. Here, we present a pulse compression scheme to reduce the pulse duration of a commercial Yb:KGW laser operating at 100 kHz repetition rate and 40 mu J pulse energy from 390 to 38 fs. The spectral broadening is accomplished using a krypton-filled Kagome-type fiber. We report broadened spectra for variable Kr-pressures and input powers. At optimal settings of 8 bar Kr-pressure and 3.3 W input power, the bandwidth of the pulse at the -10 dB level increased from 9.5 to 85 nm corresponding to a Fourier limit of 26 fs. A simple SF10 prism compressor is used to reduce the accumulated chirp and shortens the fiber output from about 500 to 38 fs. In addition to the spectral broadening, a pressure dependent change of the polarization is observed.
KW  - pulse compression
KW  - ultrafast optics
KW  - photonic crystal fibers
Y1  - 2019
U6  - https://doi.org/10.1088/2040-8986/aafdf6
SN  - 2040-8978
SN  - 2040-8986
VL  - 21
IS  - 2
PB  - IOP Publ. Ltd.
CY  - Bristol
ER  -