Optimal design and performance study of a low-index-contrast MMI optical coupler

Author

Hossen, Raqibul ; Ahmmed, Kazi Tanvir ; Chowdhury, A. Zahed ; Hossain, M. Shamim ; Murad Hasan, R.M.

Author_Institution

Dept. of Appl. Phys., Electron. & Commun. Eng., Univ. of Chittagong, Chittagong, Bangladesh

fYear

2014

fDate

21-23 Oct. 2014

Firstpage

230

Lastpage

233

Abstract

The multimode interference (MMI) coupler is a versatile component for photonic signal processing applications. In present day, research scenarios based on low-index-contrast MMI couplers give more scope of study as it has certain advantages over high-index-contrast MMI couplers. In this work we presented an optimal design for the low-index-contrast MMI coupler. From various possible structures, we considered Silica-on-Silicon based 4×4 MMI coupler. Various techniques such as conventional self imaging, improved self-imaging and Genetic algorithm are used here, with numerical analysis such as mode propagation analysis, beam propagation method for evaluating optimal performance by adjusting the parameters of the structure. The optimum structure is finally selected one from them by comparing the results of these different techniques.

Keywords

Talbot effect; elemental semiconductors; genetic algorithms; integrated optics; light interference; optical couplers; optical design techniques; optical information processing; silicon; silicon compounds; SiO₂-Si; beam propagation method; conventional self imaging; genetic algorithm; improved self-imaging; low-index-contrast MMI optical coupler; mode propagation analysis; multimode interference coupler; numerical analysis; optimal design; optimal performance; photonic signal processing applications; silica-on-silicon-based 4×4 MMI coupler; Couplers; Genetic algorithms; Indexes; Interference; Optical imaging; Optical waveguides; 4×4 MMI coupler; Beam propagation method; Low-index-contrast; Mode propagation analysis; Multimode Interference coupler; Self imaging; Silica-on-silicon waveguide;

fLanguage

English

Publisher

ieee

Conference_Titel

Strategic Technology (IFOST), 2014 9th International Forum on

Conference_Location

Cox´s Bazar

Print_ISBN

978-1-4799-6060-6

Type

conf

DOI

10.1109/IFOST.2014.6991110

Filename

6991110