[1] G. A. Ball, W. M. Morey. Continuously tunable single-mode erbium fiber lasers. Opt. Lett., 1992, 17(6): 420~422
[2] G. P. Lees, M. J. Cole, T. P. Newson. Narrow linewidth, Q-switched erbium doped fiber laser. Electron. Lett., 1996, 32(14): 1299~1300