[1] [1] Archambault J L, Russell P S J, Barcelos S et al.. Grating-frustrated coupler: A novel channel-dropping filter in single-mode optical fiber. Opt. Lett., 1994, 19(3):180～182

[2] [2] Baumann I, Seifert J, Novak W et al.. Compact all-fiber add-drop-mutiplexer using fiber Bragg gratings. IEEE Photon. Technol. Lett., 1996, 8(10):1331～1333

[3] [3] Bakhti F, Sansonetti P, Sinet C et al.. Optical add/drop multiplexer based on UV-written Bragg-grating in a fused 100% coupler. Electron. Lett., 1997, 33(9):803～804

[4] [4] Orlov S S, Yariv A, Essen S V, Coupled-mode analysis of fiber-optic add-drop filters for dense wavelength-division multiplexing. Opt. Lett., 1997, 22(10):688～690

[5] [5] Marin E, Ghosh R, Lacroix S et al..Bragg grating effects in optical fiber couplers calculated by coupled supermode theory. Proc. SPIE, 1998, 3542:32～42

[6] [6] Hardy A A. A unified approach to coupled-mode phenomena. J. Lightwave Technol., 1998, 34(7):1109～1116

[7] [7] Izhaky N, Hardy A. Analysis of grating-assisted backward coupling employing the unified coupled-mode formalism. J. Opt. Soc. Am. (A), 1999, 16(6):1303～1311

[8] [8] Hardy A A, Streifer W. Coupled-mode theory of parallel waveguides. J. Lightwave Technol., 1985, LT-3(5):1135～1146

[9] [9] Erdogan T. Fiber grating spectra. J. Lightwave Technol., 1997, 15(8):1277～1294

[10] [10] Sipe J E, Poladian L, Sterk C M. Propagation through nonuniform grating structures. J. Opt. Soc. Am. (A), 1994, 11(4):1307～1320