Two mode-lock regimes are observed experimentally and theoretically in the all-normal-dispersion fiber lasers: strong- and weak-modulation regimes. The pulse properties of these two regimes are investigated and summarized. The weak-modulation regime provides stable mode-locked pulses with picosecond pulse duration and broad spectrum linewidth. It well fits the chirped-pulse amplification as a seed source. An all-fiber all-normal-dispersion fiber ring laser is established. Stable mode-locked pulses with a pulse duration of 75 ps and a linewidth of 17.8 nm are obtained. The experimental results have a good agreement with the weak-modulation regime predicted in theory.
© 2010 Optical Society of America
Lasers and Laser Optics
Original Manuscript: April 16, 2010
Revised Manuscript: June 15, 2010
Manuscript Accepted: June 17, 2010
Published: July 16, 2010
Jie Zhou, Ping Yan, Dongsheng Wang, and Mali Gong, "Experimental and theoretical study of the weak-modulation all-normal-dispersion mode-locked fiber lasers," J. Opt. Soc. Am. B 27, 1589-1593 (2010)