Simulation and experimental results for high repetition rate all-normal dispersion Yb:fiber ring lasers are demonstrated for the cavity dispersion from 0.01 to 0.025 ps<sup>2</sup>. The simulation shows that the pulse spectrum has the potential to reach > 30 nm for the dispersion of 0.014 ps<sup>2</sup> under practical pump power. This potential is proved by the experiment. Maximum spectral width of 30 nm is achieved at the repetition rate of 285 MHz under the 850-mW pump power. Average output power is 550 mW and dechirped pulse is 78 fs.
© 2012 Chinese Optics LettersPDF Article