An erbium-doped fiber (EDF) laser was configured with a fiber grating, a fiber ring resonator, and a saturable absorber by using un-pumped EDF as mode selection element. The laser showed single mode operation with a narrow linewidth of 5 kHz. The mode selection mechanisms of the un-pumped EDF and the ring resonator are theoretically and experimentally analyzed.
© 2006 Chinese Optics Letters
Jing Yang, Ronghui Qu, Guoyong Sun, Jianxin Geng, Haiwen Cai, and Zujie Fang, "Suppression of mode competition in fiber lasers by using a saturable absorber and a fiber ring," Chin. Opt. Lett. 4, 410-412 (2006)