Title :
Investigation of 3D semivectorial finite-difference beam propagation method for bent waveguides
Author :
Deng, Hua ; Jin, Guang Hai ; Harari, Joseph ; Vilcot, Jean Pierre ; Decoster, Didier
Author_Institution :
Harbin Inst. of Technol., China
fDate :
5/1/1998 12:00:00 AM
Abstract :
A three dimensions of semivectorial finite difference beam propagation method (FD-BPM) in cylindrical coordinates is investigated in order to analyze the optical wave propagation in the bent waveguides with the strong lateral confinement which will keep low radiation loss. The three dimensional (3D) semivectorial wave propagation equation is programmed in the quick and unconditionally stable procedure by using the alternating direction implicit method. This version of FD-BPM could well express the polarization characteristics of modal field near the dielectric interfaces and accurately simulate the wave propagation in bent waveguides even at a very small radius (<100 μm). Moreover, it is pointed out that the numerical precision of the algorithm is intensively affected by the propagation loss of bent waveguides along with the propagation step length of beam propagation method
Keywords :
bending; finite difference methods; optical losses; optical waveguide theory; optical waveguides; vectors; 3D semivectorial finite-difference beam propagation method; alternating direction implicit method; beam propagation method; bent waveguides; cylindrical coordinates; dielectric interfaces; low radiation loss; modal field; numerical precision; optical wave propagation; polarization characteristics; propagation loss; propagation step length; strong lateral confinement; unconditionally stable procedure; very small radius; wave propagation; Dielectric substrates; Electromagnetic waveguides; Finite difference methods; Optical losses; Optical polarization; Optical polymers; Optical propagation; Optical waveguides; Partial differential equations; Propagation losses;
Journal_Title :
Lightwave Technology, Journal of
