[1] [1] Chen Yue, Xie Yirong, Sun Jin. Theory of optical filter［J］. Network Equipment and Technology, 2005, 12(4): 58～60

[2] [2] K. Morishita, M. S. Yataki, W. A. Gambling. In-line optical fiber filters using dispersive materials［J］. Opt. Lett., 1987, 12(7): 534～535

[3] [3] J. Nishimura, K. Morishita. Control of spectral characteristics of dispersive optical fibers by annealing［J］. Lightwave Technol., 1997, 15(2): 294～298

[4] [4] K. Oh, J. W. Yu, H. S. Seo et al.. High silica dispersive optical fiber and its application as an in-line short-pass fiber filter [C]. Conference on Lasers and Electro-Optics (CLEO′99), 1999, pp. 386～387

[5] [5] J. W. Yu, K. Oh, U. C. Paek. A new in-line long-wavelength-pass filter using a high silica dispersive fiber [C]. Optoelectronics and Communications Conference (OECC′99), 1999, pp. 1603～1605

[6] [6] J. W. Yu, K. Oh. New in-line fiber band pass filters using high silica dispersive optical fibers［J］. Opt. Commun., 2002, 204(1-6): 111～118

[7] [7] S. Kawakami, S. Nishida. Characteristics of a doubly clad optical fiber with a low-index inner cladding［J］. Quantum Electron., 1974, 10(12): 879～887

[8] [8] Seongwoo Yoo, Yongmin Jung, Junki Kim et al.. W-type fiber design for application in U- and S-band amplifiers by controlling the LP01 mode long wavelength cut-off［J］. Optical Fiber Technology, 2005, 11(4): 332～345

[9] [9] Safaai-Jazi A, Gar Lam Yip. Cutoff conditions in three-layer cylindrical dielectric waveguides［J］. IEEE Microwave Theory and Techniques Society, 1978, 26(11): 898～903

[10] [10] J. W. Fleming. Material dispersion in lightguide glasses［J］. Electron. Lett., 1978, 14: 326～328

[11] [11] Michel Monerie. Propagation in doubly clad single-mode fibers［J］. Quantum Electron., 1982, 189(4): 535～542

[12] [12] Xianqing Tian, Xiaoping Zhang. Dispersion-flattened designs of the large effective-area single-mode fibers with ring index profiles［J］. Opt. Commun., 2004, 230(1-3): 105～113

[13] [13] H. T. Hattori, A. Safaai-Jazi. Fiber designs with significantly reduced nonlinearity for very long distance transmission［ J］. Appl. Opt., 1998, 37(15): 3190～3197

[14] [14] Jiang Mingjun, Lin Zhiyuan. Effects of central dip in refractive index on propagation characteristics of W-type single-mode fibers［J］. Acta Optical Sinica, 1985, 5(1): 49～55

[15] [15] Chujun Zhao, Runwu Peng, Zhixiang Tang. Modal fields and bending loss analyses of three-layer large flattened mode fibers［J］. Opt. Commun., 2006, 266(1): 175～180

[16] [16] Somayeh Makouei, Morteza Savadi Oskouei, Ali Rostami. Study of bending loss and mode field diameter in depressed inner core triple-clad single-mode optical fibers［J］. Opt. Commun., 2007, 280(1): 58～67

[17] [17] Song Xuepeng, Huang Yongqing, Ren Xiaomin. Photonic bandgap fiber［J］. Study on Optical Communications, 2005, (4): 57～60