High‐energy chirally‐coupled‐core Yb‐fiber laser with high dispersion mirror compressor to achieve 1W-level, sub-100fs pulses with diffraction-limited beam quality

We demonstrate a high-energy femtosecond laser system that incorporates two rapidly advancing technologies: chirally-coupled-core large-mode-area Yb-fiber to ensure fundamental-mode operation and high-dispersion mirrors to enable loss-free pulse compression while preserving the diffraction-limited beam quality.