[1] Yamauchi J,Kikuchi S.Beam propagation analysis of bent step-index slab waveguides.Electron Lett,1990,26(12):822～833

[2] Rivera M.A finite difference BPM analysis of bent dielectric waveguides.J Lightwave Tech,1995,13(2):233～238

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

[4] Baker G A.Essentials of Padé approximants.America,New York,1975

[5] Hadley G R.Multi-step method for wide-angle beam propagation.Opt Lett,1992,17(24):1743～1745

[6] Ramahi O M,Khebir A.Numerically-derived absorbing boundary conditions for the solution of open region scattering problems.IEEE Trans Antennas Propagat,1991,39(3):350～353

[7] Hadley G R.Transparent boundary condition for beam propagation method.Opt Lett,1991,16(9):624～626