Title :
Numerical study of spot-size expanders for an efficient OEIC to SMF coupling
Author :
Rajarajan, M. ; Rahman, B.M.A. ; Grattan, K.T.V.
Author_Institution :
Dept. of Electr. & Electron. Eng., City Univ., London, UK
Abstract :
Different types of spot-size converters are studied numerically, and their coupling loss and reflection properties are discussed in detail. The rigorous vector finite-element method is used to calculate the modal propagation properties and the least-squares boundary residual method is employed to calculate the coupling loss, reflection coefficient, and the alignment tolerances of the devices. It has also been observed that the reflection coefficient reaches a minimum when the mode confinement is at its maximum.
Keywords :
finite element analysis; integrated optoelectronics; light reflection; optical communication equipment; optical fibre couplers; optical fibre losses; vectors; alignment tolerances; coupling loss; efficient OEIC to SMF coupling; least-squares boundary residual method; modal propagation properties; mode confinement; numerical study; reflection coefficient; reflection properties; rigorous vector finite-element method; single mode fibre coupling; spot-size expanders; Finite element methods; Laser modes; Optical coupling; Optical devices; Optical fiber devices; Optical reflection; Optical waveguides; Optoelectronic devices; Refractive index; Substrates;
Journal_Title :
Photonics Technology Letters, IEEE
