An all-fiber passively Q-switched Yb-doped fiber laser with fiber saturable absorber (SA) based on a piece of Sm-doped fiber is presented. For the first time, we observe the fast stimulated Brillouin scattering Q-switched process in an Yb/Sm all-fiber laser and obtain 41 ns pulses and 1.7 kW maximum peak power. Compared with the reported traditional SA Q-switched process, the pulse energy and peak power are both improved an order of magnitude. Furthermore, a traditional SA Q-switched process with 450 ns pulsewidth and 7.5 W peak power is also obtained in the same structure by increasing the feedback of cavity's output end.
© 2014 IEEE
Original Manuscript: December 11, 2013
Manuscript Accepted: May 30, 2014
Published: June 5, 2014
Man Hu, Bing He, Houkang Liu, Yifeng Yang, Ye Zheng, Xiaolong Chen, Lei Zhang, and Jun Zhou, "High-Peak Power, All-Fiber Passively Q-Switched Laser Using a Sm-Doped Fiber Saturable Absorber," J. Lightwave Technol. 32, 2510-2515 (2014)