[1] [1] H. E. Engan, B. Y. Kim, J. Blake et al..Propagation and optical interaction of guided acoustic waves in two-mode optical fibers. J. Lightwave Technol., 1988, 6(3):428～435

[2] [2] H. S. Kim, S. H. Yun, I. K. Kwang et al.. All-fiber acousto-optic tunable notch filter with electronically controllable spectral profile. Opt. Lett., 1997, 22(19):1476～1478

[3] [3] H. S. Kim, S. H. Yun, B. Y. Kim. Actively gain-flattened erbium-doped fiber amplifier over 35 nm by using all-fiber acoustoopitc tunable filters. IEEE Photon. Technol. Lett., 1997, 10(6):790～792

[4] [4] D. Ostling, H. E. Engan. Narrow-band acousto-optic tunable filtering in a two-mode fiber. Opt. Lett., 1995, 20(11):1247～1249

[5] [5] Ying Chongfu. Ultrasonics. Beijing: Science Press, 1990