We demonstrate a hybridly mode-locked erbium-doped fiber laser. It combines saturable absorption and nonlinear polarization evolution to produce stable and purified femtosecond pulses with a high repetition rate of 212 MHz. The average output power is larger than 65 mW, and the single-pulse energy is 0.31 nJ at a pump power of 750 mW. A wide spectrum with FWHM of 61.4 nm is obtained. The dechirped pulse duration is 41.9 fs, which is near the transform-limited range.
© 2014 Optical Society of America
Lasers and Laser Optics
Original Manuscript: December 12, 2013
Revised Manuscript: February 11, 2014
Manuscript Accepted: February 11, 2014
Published: March 12, 2014
Xing Li, Weiwen Zou, and Jianping Chen, "41.9 fs hybridly mode-locked Er-doped fiber laser at 212 MHz repetition rate," Opt. Lett. 39, 1553-1556 (2014)