Mode-locked all-solid photonic bandgap fiber laser

We report on a mode-locked all-normal dispersion fiber laser featuring a large-mode-area all-solid photonic bandgap fiber. The self-starting chirped-pulse laser delivers 660 mW of average power at a repetition rate of 30 MHz, leading to 22 nJ energy. The output pulses are dechirped outside the cavity to nearly transform-limited duration of 50 fs. Numerical simulations are in good agreement with experiments and highlight the key role of passive spectral filtering on pulse shaping.