Journal ArticleDOI
Compact efficient broadband grating coupler for silicon-on-insulator waveguides.
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TLDR
A high-efficiency broadband grating coupler for coupling between silicon-on-insulator (SOI) waveguides and optical fibers and the size of the grooves is optimized numerically.Abstract:
We have designed a high-efficiency broadband grating coupler for coupling between silicon-on-insulator (SOI) waveguides and optical fibers. The grating is only 13 µm long and 12 µm wide, and the size of the grooves is optimized numerically. For TE polarization the coupling loss to single-mode fiber is below 1 dB over a 35-nm wavelength range when using SOI with a two-pair bottom reflector. The tolerances to fabrication errors are also calculated.read more
Citations
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Journal ArticleDOI
High-extinction-ratio silicon polarization beam splitter with tolerance to waveguide width and coupling length variations
Yong Zhang,Yu He,Jiayang Wu,Xinhong Jiang,Ruili Liu,Ciyuan Qiu,Xiaoqing Jiang,Jianyi Yang,Christine Tremblay,Yikai Su +9 more
TL;DR: A compact silicon polarization beam splitter based on grating-assisted contradirectional couplers (GACCs) that exhibits tolerance in width variation, and the polarization extinction ratios remain higher than 20 dB for both polarizations when the width variation is adjusted from + 10 to -10 nm.
Journal ArticleDOI
High confinement in silicon slot waveguides with sharp bends
TL;DR: It is shown that the relative power inside the slot can be as high as 28% for a 1 mum radius bend in an air-clad silicon waveguide.
Journal ArticleDOI
Efficient planar fiber-to-chip coupler based on two-stage adiabatic evolution.
TL;DR: A new, efficient adiabatic in-plane fiber-to-chip coupler design that allows to reduce the coupler length multiple times in comparison with pure inverse taper-based couplers of similar efficiency is proposed.
Journal ArticleDOI
CMOS-compatible high efficiency double-etched apodized waveguide grating coupler
TL;DR: Measurements and simulations show that the double-etched apodized grating coupler design is robust and tolerant to fabrication process variations.
References
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Journal Article
Electromagnetic Optimization by Genetic Algorithms
TL;DR: This book describes numerous applications of genetic algorithms to the design and optimization of various low- and high-frequency electromagnetic components and provides a comprehensive list of the up-to-date references applicable to electromagneticdesign problems.
Journal ArticleDOI
Ultra-low loss photonic integrated circuit with membrane-type photonic crystal waveguides
TL;DR: The combination of an efficient two-stage coupling scheme and utilization of ultra-long (up to 2mm) photonic crystal waveguides reduces the uncertainty in determining the loss figure to 3dB/cm.
Journal ArticleDOI
An out-of-plane grating coupler for efficient butt-coupling between compact planar waveguides and single-mode fibers
Dirk Taillaert,Wim Bogaerts,Peter Bienstman,Thomas F. Krauss,P. Van Daele,Ingrid Moerman,Steven Verstuyft,K. De Mesel,Roel Baets +8 more
TL;DR: In this paper, an out-of-plane coupler for butt-coupling from fiber to compact planar waveguides is proposed based on a short second-order grating or photonic crystal, etched in a waveguide with a low-index oxide cladding.
Journal ArticleDOI
Low loss mode size converter from 0.3 [micro sign]m square Si wire waveguides to singlemode fibres
TL;DR: In this article, a novel integrated mode size converter for single-mode Si wire waveguides is presented, which is constructed with two-dimensional tapered Si waveguide and overlaid high-index polymer waveguide.
Journal ArticleDOI
Optical modelling of photonic crystals and VCSELs using eigenmode expansion and perfectly matched layers
Peter Bienstman,Roel Baets +1 more
TL;DR: In this paper, a modeling approach for photonic crystal structures and vertical-cavity surface-emitting lasers (VCSELs) is presented based on vectorial eigenmode expansion combined with perfectly matched layer (PML) boundary conditions.