We propose and demonstrate an all-fiber self-Q-switched erbium laser system that is saturable-absorber Q switched by the mismatch of the mode-field areas in the resonator and stabilized with a saturable-amplifier pump switch. Sequential pulses with a pulse energy of 8–6 μJ and a pulse duration of 80–320 ns, corresponding to a pulse repetition rate of 0.25–1 kHz, were obtained using a cw 980 nm laser-diode pump. A peak pulse power of near 100 W was achieved.
© 2009 Optical Society of America
Lasers and Laser Optics
Original Manuscript: June 24, 2009
Revised Manuscript: August 6, 2009
Manuscript Accepted: August 18, 2009
Published: September 17, 2009
Tzong-Yow Tsai, Yen-Cheng Fang, Zhi-Cheng Lee, and Hong-Xi Tsao, "All-fiber passively Q-switched erbium laser using mismatch of mode field areas and a saturable-amplifier pump switch," Opt. Lett. 34, 2891-2893 (2009)