[1] Monerie M. Propagation in doubly clad single-mode fibers. IEEE Quant. Electron., 1982, 18(4):535～542

[2] Hagemann H J, Lade H, Warnier J. The Performance of depressed-cladding single-mode fibers with different b/a ratios. J. Lightwave Technol., 1991, 9(6):689～694

[3] Luo Jie, Qin Qinan, Ye Peida. The ralation between the dispersion characteristics of W-profile broadband dispersion compensation fiber and its structural parameters. J. Opt. Commun., 2000, 21(3):90～93

[4] Neves I V, Fernandes A S C. Dispersion patterns for extended W-and M-type optical fiber profiles. Microw. Opt. Technol. Lett., 2000, 24(2):112～117

[5] Cozens J R, Boucouvalas A C. Coaxial optical coupler. Electron. Lett., 1982, 18(3):138～140

[6] Boucouvalas A C. Coaxial optical fiber coupling. IEEE J. Lightwave Technol., 1985, 3(5):1151～1158

[7] Boucouvalas A C, Georgiou G. Biconical taper coaxial optical filter. Electron. Lett., 1985, 21(20):1033～1034

[8] Boucouvalas A C, Georgiou G. Concatenated tapered coaxial coupler filters. IEE Proc., 1987, 134(3):191～195

[9] Nunes F D, de Souza Melo C A. Theoretical study of coaxial fibers. Appl. Opt., 1996, 35(3):388～398

[10] Gong Yandong, Guan Yali, Jiang Zhongao et al.. Dispersion compensating fiber with negative dispersion slope. Acta Optica Sinica (光学学报), 1998, 18(3):330～333 (in Chinese)

[11] Ren Jianhua, Yu Chongxiu, Wang Kuiru. Analytic resolution of waveguide dispersion in single mode fiber. Acta Optica Sinica (光学学报), 2001, 21(11):1301～1304 (in Chinese)

[12] Wu Chongqing. Optical Waveguide Theory (光波导理论). Beijing: Tsinghua University Press, 2000. 65～67 (in Chinese)