Ultra-compact low loss polarization insensitive silicon waveguide splitter

Ultra-compact low loss polarization insensitive silicon waveguide splitter

We observe that the cascaded typical Y junctions will introduce unwanted periodic fringes over the spectrum in practical systems when they link with multimode waveguides. To solve the problem, we design and experimentally demonstrate a wavelength insensitive multimode interferometer (MMI) based 3-dB...

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Bibliographic Details
Main Authors: Xiao, Zhe, Luo, Xianshu, Lim, Peng Huei, Prabhathan, Patinharekandy, Liow, Tsung-Yang, Zhang, Jing, Luan, Feng, Silalahi, Samson T. H.
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2013
Subjects:
DRNTU::Engineering::Electrical and electronic engineering
Online Access:https://hdl.handle.net/10356/98256
http://hdl.handle.net/10220/13309
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Institution: Nanyang Technological University
Language: English
Description
Summary:We observe that the cascaded typical Y junctions will introduce unwanted periodic fringes over the spectrum in practical systems when they link with multimode waveguides. To solve the problem, we design and experimentally demonstrate a wavelength insensitive multimode interferometer (MMI) based 3-dB splitter which has all the merits of Y-splitters such as polarization insensitivity and ultra-compactness. The splitter has a footprint of 1.5 × 1.8 µm2, nearly one order smaller than the previously reported MMI splitters. The measured excess losses for TE and TM modes at telecom wavelength are as low as −0.11 dB and −0.18 dB respectively.

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