Title :
Accurate analysis of multimode interference devices
Author :
Rahman, B.M.A. ; Rajarajan, M. ; Wongcharoen, T. ; Grattan, K.T.V.
Author_Institution :
Dept. of Electr., Electron. & Inf. Eng., City Univ., London, UK
fDate :
6/1/1996 12:00:00 AM
Abstract :
The accurate analysis of multimode interference devices is demonstrated by using the least-squares boundary residual (LSBR) method. Accurate modal propagation constants and spatial field profiles in the multimode interference (MMI) section can be obtained by using the finite-element method. The accurate calculation of the excited modal coefficients is achieved by using the LSBR, which satisfies the continuity of the transverse field components more rigorously than the simple overlap integrals.
Keywords :
boundary-value problems; finite element analysis; least squares approximations; light interference; optical waveguide theory; accurate analysis; accurate modal propagation constants; excited modal coefficients; finite-element method; least-squares boundary residual method; multimode interference devices; multimode interference section; simple overlap integrals; spatial field profiles; transverse field component continuity; Couplers; Finite element methods; Interference; Optical devices; Optical interferometry; Optical polarization; Optical propagation; Optical signal processing; Optical waveguides; Planar waveguides;
Journal_Title :
Photonics Technology Letters, IEEE
