[7] Wong G K N, Damzen M J. Investigations of optical feedback used to enhance stimulated scattering. IEEE J. Quant. Electron., 1990, 26(1):139～148

[8] Duignan M T, Feldman B J, Whitney W T. Threshold reduction for stimulated Brillouin scattering using a multipass Herriott cell. J. Opt. Soc. Am. (B), 1992, 9(4): 548～559

[9] Scott A M, Whitney W T, Duignan M T. Stimulated Brillouin scattering and loop threshold reduction with a 2.1 μm Cr, Tm, Ho∶YAG laser. J. Opt. Soc. Am. (B), 1994, 11(10): 2079～2087

[10] Scott A M, Whitney W T. Characteristics of a Brillouin ring resonator used for phase conjugation at 2.1 μm. J. Opt. Soc. Am. (B), 1995, 12(9): 1634～1641

[11] Axel Heuer, Ralf Menzel. Phase-conjugating stimulated Brillouin scattering mirror for low powers and reflectivities above 90% in an internally tapered optical fiber. Opt. Lett., 1998, 23(11): 834～836