[1] [1] Cai Haiwen, Luo Aiping, Chen Gaoting et al.. Fiber grating filters writing in fiber coupler [J]. J. Optoelectronics·Laser, 2002, 13(9):979～982

[2] [2] J. L. Archambault, P. St. J. Russell, S. Bacelos et al.. Grating-frustrated coupler: a novel channel dropping filter in single-mode optical fiber [J]. Opt. Lett., 1994, 19(3):180～182

[3] [3] Ingolf Baumann, Joachim Seifert, Walter Now et al.. Compact all-fiber add-drop-multiplexer using fiber Bragg gratings [J]. IEEE Photon. Technol. Lett., 1996, 8(10):1331～1333

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

[5] [5] L. Dong, P. Hua, T. A. Birks et al.. Novel add/drop filters multiplexing optical for wavelength division fiber systems using a Bragg grating assisted mismatch coupler [J]. IEEE Photon. Technol. Lett., 1996, 8(12):1656～1658

[6] [6] Beatriz Ortega, Liang Dong, Laurence Reekie. All-fiber optical add-drop multiplexer based on a selective fused coupler and a single fiber Bragg grating [J]. Appl. Opt., 1998, 37(33):7712～7717

[7] [7] 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):4739～4742

[8] [8] Honglin An, Brian Ashton, Simon Fleming. Long-period-grating-assisted optical add-drop filter based on mismatched twin-core photosensitive-cladding fiber [J]. Opt. Lett., 2004, 29(4):343～345

[9] [9] 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

[10] [10] Shuai Cijun, Duan Ji’an, Cai Guohua. Research on morphology and microstructure in the taper region of fused fiber devices [J]. Acta Optica Sinica, 2006, 26(1):121～125

[11] [11] Liu Chunyu, Ye Hong’an, Cao Xue. Fiber coupler sensitive to wavelength used to demodulate wavelength shift of fiber Bragg grating [J]. Acta Optica Sinica, 2006, 26(11):1623～1626

[12] [12] Zhang Ruifeng, Ge Chunfeng, Wang Shuhui et al.. Fused biconical taper all-wave coupler [J]. Acta Physica Sinica, 2003, 52(2):390～394

[13] [13] Kwang Yong Song, Byong Yoon Kim. Broad-band LP02 mode excitation using a fused-type mode-selective coupler [J]. IEEE Photon. Technol. Lett., 2003, 15(12):1734～1736

[14] [14] Kwang Yong Song, In Kag Hwang, Seok Hyun Yun et al.. High performance fused-type mode-selective coupler using elliptical core two-mode fiber at 1550 nm [J]. IEEE Photon. Technol. Lett., 2002, 14(4):501～503

[15] [15] Dong Xiaowei, Xu Ou, Lu Shaohua et al..Design and experiment of add/drop filter based on double-fiber-Bragg-gratings coupler [J]. Chinese J. Lasers, 2007, 34(8):1106～1109

[16] [16] E. Marin, R. Ghosh, S. Lacroix et al.. Bragg grating effects in optical fiber couplers calculated by coupled supermode theory ［C］. SPIE, 1998, 3542:32～42

[17] [17] Jiang Weiwei, Li Jian, Zhao Ruifeng et al.. Analysis of fiber grating filters writing in fiber coupler by employing the unified coupled-mode theory [J]. Acta Optica Sinica, 2010, 30(3):644～649

[18] [18] Li Jian. Study on photosensitive erbium doped fibers and Bragg grating-assisted coupler for add/drop filters[D]. Beijing: Beijing Jiaotong University, 2009. 95～96