Title :
Theoretical Investigation of Polarization-Insensitive Multimode Interference Splitters on Silicon-on-Insulator
Author_Institution :
Electr. Eng. Dept., Bucknell Univ., Lewisburg, PA
fDate :
7/15/2008 12:00:00 AM
Abstract :
An ultracompact polarization-insensitive 1times2 multimode interference (MMI) splitter based on silicon-on-insulator is investigated theoretically. The impact of the insulator index on the size of the MMI and the polarization-dependent performance is analyzed. A polarization-insensitive 1times2 MMI splitter of 4 mum by 16.5 mum is shown as an example. Relaxed tolerances on MMI width (> plusmn100 nm) and length (> plusmn0.7 mum) are obtained for both polarizations while the polarization differential loss is kept in range of 0.1 dB and its excess loss is kept below 0.5 dB. In addition, a wide operation wavelength window of 150 nm is obtained for both polarizations as well.
Keywords :
optical beam splitters; polarisation; silicon-on-insulator; insulator index; multimode interference splitters; polarization differential loss; polarization-insensitive splitters; silicon-on-insulator; Insulation; Interference; Optical devices; Optical filters; Optical losses; Optical polarization; Optical waveguides; Performance analysis; Photonic integrated circuits; Silicon on insulator technology; Multimode interference (MMI); polarization-insensitive; silicon (Si) wire waveguide; silicon-on-insulator (SOI); tolerance;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2008.926005
