[2] [2] Huang W P, Liu C L. Simulation of three-dimensional optical waveguides by a full-vector beam propagation method. IEEE J. Quant. Electron., 1993, 29(10): 2639～2649

[3] [3] Chung Y, Dagli N. Assessment of finite difference beam propagation. IEEE J. Quant. Electron., 1990, 26(8): 1335～1339

[4] [4] Feit M D, Freck J A J r. Light propagation in graded-index optical fibers. Appl. Opt., 1979, 18(16): 2843～2851

[5] [5] Hermansson B, evick D. Propagating-beam method analysis of two-dimensional microlenses and three-dimensional taper structure. J. Opt. Soc. Am.(A), 1984, 1(6): 663～671

[6] [6] Hadley G R, Smith R E. Full-vector waveguide modeling using an iterative finite-difference method with transparent boundary conditions. J. Lightwave Technol., 1995, 13(3): 465～469

[7] [7] Accornero R, Artiglia M, Coppa G et al.. Finite difference methods for the analysis of integrated optical waveguides. Electron. Lett., 1990, 26(23): 1959～1960

[8] [8] Vincetti L, Cucinotta A, Selleri S. Three-dimensional finite-element beam propagation method: assessments and development. J. Opt. Soc. Am.(A), 2000, 17(6): 1124～1131

[9] [9] Hadely G R. Wide-angle beam propagation using Padé approximant operators. Opt. Lett., 1992, 17(20): 1426～1428

[10] [10] Hadely G R. Multistep method for wide-angle beam propagation. Opt. Lett., 1992, 17(24): 1743～1745

[11] [11] Kawano K, Kitoh T. Int roduction to Optical Waveguide A nalysis. New York: John Willey & Sons, Inc., 2001. 204～213

[12] [12] Hadely G R. Transparent boundary condition for the beam propagation method. J. Quant. Electron., 1992, 28(1): 363～370