We report a 1030 nm-wavelength Yb:fiber laser that produces the shortest/direct output pulse duration (502 fs) among all-normal-dispersion fiber lasers at the highest repetition rate (605 MHz) among the passively fundamentally mode-locked fiber lasers. The laser also exhibits an optical efficiency of 70% at CW and 65% at mode-locking modes.
© 2012 Optical Society of America
Original Manuscript: October 11, 2011
Revised Manuscript: January 5, 2012
Manuscript Accepted: January 5, 2012
Published: February 29, 2012
Hongyu Yang, Aimin Wang, and Zhigang Zhang, "Efficient femtosecond pulse generation in an all-normal-dispersion Yb:fiber ring laser at 605 MHz repetition rate," Opt. Lett. 37, 954-956 (2012)