We report, for the first time to our knowledge, the presence of concentration-induced nonuniform power in tunable erbium-doped fiber lasers. A theoretical model is proposed with pair-induced quenching taken into account. We obtain good agreement between numerical and experimental results of a high-concentration erbium-doped fiber ring laser with a large tuning range of over 100 nm. These findings are useful for the design of lasers with doped fibers.
© 2004 Optical Society of America
Xinyong Dong, Nam Quoc Ngo, Ping Shum, Bai-Ou Guan, Hwa-Yaw Tam, and Xiaoyi Dong, "Concentration-induced nonuniform power in tunable erbium-doped fiber lasers," Opt. Lett. 29, 358-360 (2004)