[1] Miliou A,Zhengwang H,Cheng H C,et al.K+-Na+ ion-exchange channel waveguides:fabrication and characterization.IEEE J Quantum Electron,1989,25(8):1889~1897
[2] Bachmann M,Besse P A,Mechior H.General self-imaging properties in NN multi-mode interference couplers including phase relations.Appl Opt,1994,33(17):3905~3911
[3] Soldno L B,Pennings E C M.Optical multi-mode interference devices based on self-imaging:principles and applications.J Lightwave Technol,1995,13(4):615~627
[5] Huang W P,Xu C L,Cheng S K.A finite-difference vector beam propagation method for three-dimensional waveguide structures.IEEE Photon,Technol Lett,1992,4(2):148~151
[6] Hadley G.Transparent boundary condition for beam propagation method.Opt Lett,1991,16(9):624~626