Journal ArticleDOI
Compact efficient broadband grating coupler for silicon-on-insulator waveguides.
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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
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High efficiency grating couplers based on shared process with CMOS MOSFETs
TL;DR: In this paper, a high-efficiency and complementary metal-oxide-semiconductor (CMOS) process compatible grating coupler is proposed, where the poly-Si layer used as a gate in the CMOS metaloxide semiconductor field effect transistor (MOSFET) is combined with a normal fully etched grating coupling coupler, which greatly enhances its coupling efficiency.
Journal ArticleDOI
Detachable interface toward a low-loss reflow-compatible fiber coupling for co-packaged optics (CPO).
TL;DR: In this paper , a detachable coupling interface based on expanded beam edge coupling is proposed for optical coupling between lasers, PICs, and fibers, seamlessly supporting many channels with high efficiency.
Journal ArticleDOI
Subwavelength gratings on a free-standing HfO 2 membrane for out-of-plane coupling of visible light
TL;DR: Subwavelength grating couplers implemented on free-standing HfO2 membrane are proposed for out-of-plane coupling of visible light as discussed by the authors, which is realized by double-side fabrication, which combines front patterning of grating grooves with a back-releasing of the Si substrate.
Posted Content
Vertical Injection and Wideband Grating Coupler Based on Asymmetric Grating Trenches
TL;DR: In this paper, a fiber-to-chip grating coupler based on engineered subwavelength structures is proposed and numerically analyzed by using two-dimensional Finite Difference Time Domain (2D FDTD) method.
Simulation of Light Coupling Reciprocity for a Photonic Grating
TL;DR: In this article, the authors calculate the propagation of signal in two directions and compare the electric field profiles to estimate the mode mismatch between the signal scattered by grating and a fundamental fiber mode and show that they can be minimized by implementing the proper profile into the grating.
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.