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
Experimental demonstration of prism coupling of infrared waves into planar photonic crystal waveguide devices
TL;DR: In this article, an efficient prism coupling method was proposed to couple nonplanar infrared waves into a 2D planar photonic-crystal PhC de-vice, such as a PhC waveguide PhCW.
Proceedings ArticleDOI
Chirped and apodized silicon gratings efficiently coupled to normally incident fiber array
John Covey,Ray T. Chen +1 more
TL;DR: In this paper, a silicon grating coupler containing non-monotonic chirp, apodization, and quasi-periodicity is fabricated, re-designed, and measured.
Proceedings Article
Enhanced coupling strength grating out-couplers in III–V waveguides
Gary A. Evans,Jerome K. Butler,Ruo-Hua He,Jay B. Kirk,Jin Yao,Xuezhe Zheng,Ashok V. Krishnamoorthy +6 more
TL;DR: In this paper, a thin, low-index liner layer and a high-index cover layer over a surface grating in a III-V waveguide theoretically increases the outcoupling efficiency by one or two orders of magnitude.
Proceedings ArticleDOI
Abnormal blocking of the fundamental guided wave in a silicon waveguide by weak tunnel coupling with periodic polymer strips
TL;DR: In this article, the optical wave propagation in a singlemode silicon wire waveguide is examined and the numerical modeling by the method of lines (MoL) and by finite different time domain (FDTD) method proves that the weak reflectors with period 1.6 µm may produce a strong of the transmitting optical wave suppression (blocking) by resonant interaction of a guided mode in the silicon wire with a strong decaying optical leaky mode of the artificial segmented waveguide localized in the fully etched polymer grating placed 300 nm above the wire.
Proceedings ArticleDOI
Diffractive grating based out-of-plane coupling between silicon nanowire and optical fiber
TL;DR: In this paper, a diffractive grating in silicon was demonstrated for near vertical off-chip coupling between silicon-on-insulator (SOI) photonic nanowire and optical fiber.
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.
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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.