[1] L. Dong,P. Hua,T. A. Birks et al.. Novel add/drop filters for wavelength-division-multiplexing optical fiber systems using a Bragg grating assisted mismatched coupler[J]. IEEE Photon. Technol. Lett.,1996,8(12): 1656-1658

[2] Anthony S. Kewitsch,George A. Rakuljic,Phil A.Willems et al.. All-fiber zero-insertion-loss add-drop filter for wavelength-division multiplexing[J]. Opt. Lett.,1998,23(2): 106-108

[3] Dong Xiaowei,Pei Li,Jian Shuisheng. Add/drop channel filter based on fiber-Bragg-grating-assisted coupler fabricated by asymmetric fused taper technology[J]. Acta Physica Sinica,2006,55(9): 4739-4743

[4] Luo Aiping,Emmanuel Marin,Jean-Pierre Meunier et al.. All-fiber wavelength selective filter based on UV-written Bragg grating in conventional fused coupler[J]. Chinese J. Lasers,2004,31(12): 1491-1494

[5] A. W. Snyder,J. D. Love. Optical Waveguide Theory[M]. London,New York: Chapman and Hall,1983. 542-552

[6] A. Yariv. Coupled-mode theory for guided-wave optics[J]. IEEE J. Quantum Electron.,1973,9(4): 919-933