%0 Journal Article
%T Ultra-Compact Variable All-optical Attenuator Based on Multimode Interference Couplers on an SOI Platform
%A Trung-Thanh Le
%J International Journal of Engineering and Technology
%@ 1793-8236
%D 2012
%R 10.7763/IJET.2012.V4.377
%X Abstract¡ªIn this paper, two methods for obtaining an ultra compact variable all-optical attenuator based on multimode interference (MMI) using silicon waveguides are proposed. The first method is to use two connected silicon waveguides. The second method is to use a multimode interference coupler. B forming a surface pattern on the top of the MMI region at special positions or on the top of linking waveguides, a variable attenuator is achieved. The device dimension is about 2 ¦Ìm x30 ¦Ìm that is the smallest length of an optical attenuator reported up-to-date. Designs of the proposed devices on silicon on insulator (SOI) platform are then verified and optimized using numerical simulation methods.
%U http://www.ijetch.org/show-43-288-1.html