Title :
Finite-element modeling of one- and two-dimensional MQW semiconductor optical waveguides
Author :
Rahman, B.M.A. ; Liu, Y. ; Grattan, K.T.V.
Author_Institution :
Dept. of Electr., Electron. & Inf. Eng., City Univ., London, UK
Abstract :
A finite-element characterization of optical waveguides incorporating multiple-quantum-well (MQW) structures is presented. Optical modeling of a planar MQW region is tested to verify that the quantum-well region can be replaced by a homogeneous region with a suitable effective index. Optical modeling of a semiconductor laser incorporating MQW regions with two-transverse-dimensional confinement is then used to identify the range of single-lateral-mode operation. The effective index, the power fraction in the active region, and the spot size dependence on the total optical power for the case of a self-defocusing MQW region are also presented.<>
Keywords :
finite element analysis; laser modes; laser theory; optical self-focusing; optical waveguide theory; refractive index; semiconductor device models; semiconductor lasers; semiconductor quantum wells; 2D transversal confinement; MQW semiconductor optical waveguides; active region; effective index; finite-element characterization; finite-element modelling; homogeneous region; multiple-quantum-well; optical modelling; planar MQW region; power fraction; quantum-well region; self-defocusing MQW region; semiconductor laser; single-lateral-mode operation; spot size dependence; total optical power; Finite element methods; High speed optical techniques; Optical bistability; Optical feedback; Optical noise; Optical waveguides; Quantum well devices; Semiconductor device noise; Semiconductor lasers; Semiconductor waveguides;
Journal_Title :
Photonics Technology Letters, IEEE
