[1] [1] Bohm K, Rousser P, Weidel E et al.Low-noise fiber-optic rotation sensing. Opt. Lett., 1981, 6(2):64～66

[2] [2] Kim H K, Kim S K, Kim B Y. Polarization fiber laser gyroscope using Er-doped fiber.Optical and Quantum. Electron., 1995, 27(5): 481～485

[3] [3] Smith S P, Zarinetchi F, Ezekiel S. Narrow-linewidth stimulated Brillouin fiberlaser and applications. Opt. Lett., 1991, 16(6): 393～395

[4] [4] Gloag A, Langford N, McCallion K et al. Continuously tunable single-frequencyerbium ring fiber laser. J. Opt. Soc. Am. B, 1996, 13(5): 921～925

[5] [5] Gloag A J, Langford N, Bennion I et al. Single-frequency travelling-waveerbium-doped fibre laser incorporating a fibre Bragg grating. Opt. Comm., 1996, 123(4/6):553～557

[7] [7] Hanna D C, Percival R M, Perry I R et al. An ytterbium-doped monomode fibre laser:broadly tunable operation from 1.010 μm to 1.162 μm and three-level operation at 974 nm.J. Mod. Opt.,1990, 37(4): 517～525