A simple laser-diode pumped acoustic-optic Q-switched fiber laser is reported by using China-made large-mode-area ytterbium-doped fiber. Q-switched pulses with a beam quality factor of M2 about 2 and several hundred nanoseconds pulse duration are achieved at the repetition rate of 1-50 kHz. When the repetition rate is 1 kHz, the pulse energy is 0.93 mJ with the pulse duration of 132 ns. Meanwhile, the profile of laser pulses shows some mode-locking phenomena, the mechanism of the phenomena is discussed.
© 2007 Chinese Optics Letters
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.3510) Lasers and laser optics : Lasers, fiber
(140.3540) Lasers and laser optics : Lasers, Q-switched
(140.4050) Lasers and laser optics : Mode-locked lasers
Hongming Zhao, Qihong Lou, Jun Zhou, Fangpei Zhang, Jingxing Dong, Yunrong Wei, Libo Li, and Zhijiang Wang, "An acousto-optic Q-switched fiber laser using China-made double-cladding fiber," Chin. Opt. Lett. 5, 522-523 (2007)