Author :
Rahman, B. M Azizur ; Haxha, V. ; Haxha, S. ; Grattan, K.T.V.
Abstract :
A versatile and numerically efficient finite-element method-based approach has been developed and used to solve the associated quasi-static Laplace equation for electrodes, the full-vectorial wave equation for optical waveguides, and the evolutionary beam-propagation method for bend designs, to characterize the Mach-Zehnder-based polymer modulators incorporating ridge-type waveguide structures. The effects of the rib height and the waveguide width on a single-mode operation, the symmetry of the beam profile, the insertion loss, and the bending loss of the polymer rib waveguides are presented. Further, the effect of the rib height, the waveguide width, and the electrode width on the key modulator parameters, such as VpiL, Nm, and Z c are presented, and as a consequence, an optimized design is reported
Keywords :
Laplace equations; Mach-Zehnder interferometers; electro-optical modulation; finite element analysis; optical design techniques; optical losses; optical polymers; optical waveguide theory; optimisation; rib waveguides; ridge waveguides; waveguide discontinuities; Mach-Zehnder modulator; bend design; design optimisation; evolutionary beam-propagation method; finite-element method; full-vectorial wave equation; optical waveguides; polymer electrooptic modulators; polymer rib waveguides; quasistatic Laplace equation; ridge waveguide; Design optimization; Electrodes; Electrooptic modulators; Finite element methods; Laplace equations; Optical losses; Optical modulation; Optical polymers; Optical waveguides; Partial differential equations; Beam propagation method; electro-optic modulators; finite element method; numerical method; photonic devices; polymer devices;
