Designs of compact monolithically integrated tapered spot-size converters for efficient laser-fiber coupling

Author

Rahman, B.M.A. ; Wongcharoen, T. ; Boonthittanont, W. ; Ladele, E.O. ; Rajarajan, M. ; Obayya, Salah S. A. ; Grattan, K.T.V.

Author_Institution

Sch. of Eng., City Univ., London, UK

fYear

2002

fDate

18-19 Nov. 2002

Firstpage

289

Lastpage

293

Abstract

Most of the active devices have very small spot-size to enhance the physical interactions necessary for their operation, but when they are coupled to a standard single mode fiber, as much as 90% of the input power could be lost in this process. In this paper, various approaches to expand the spot-size by incorporating a monolithically integrated spot-size converter are presented. By using rigorous numerical simulations it is demonstrated that the coupling efficiency can be significantly increased along with the relaxation of the alignment tolerances.

Keywords

finite element analysis; integrated optoelectronics; optical fibre couplers; optical fibre losses; optical waveguides; rib waveguides; FEM; active device spot-size; alignment tolerance relaxation; compact monolithically integrated tapered spot-size converters; finite element methods; guided-wave photonic devices; laser-fiber coupling efficiency; planar cores; rib waveguide cores; single mode fiber coupling power losses; spot-size expansion; Finite element methods; Optical coupling; Optical design; Optical devices; Optical fiber devices; Optical fibers; Optical refraction; Optical variables control; Optical waveguides; Semiconductor waveguides;

fLanguage

English

Publisher

ieee

Conference_Titel

Electron Devices for Microwave and Optoelectronic Applications, 2002. EDMO 2002. The 10th IEEE International Symposium on

Print_ISBN

0-7803-7530-0

Type

conf

DOI

10.1109/EDMO.2002.1174973

Filename

1174973