scholarly journals Optimising apodized grating couplers in a pure SOI platform to −05 dB coupling efficiency

2015 ◽  
Vol 23 (12) ◽  
pp. 16289 ◽  
Author(s):  
Angelo Bozzola ◽  
Lee Carroll ◽  
Dario Gerace ◽  
Ilaria Cristiani ◽  
Lucio Claudio Andreani
Keyword(s):  
Coupling Efficiency ◽  
Grating Couplers

scholarly journals Breaking the Coupling Efficiency–Bandwidth Trade‐Off in Surface Grating Couplers Using Zero‐Order Radiation

2021 ◽  
pp. 2000542
Author(s):  
Alejandro Sánchez‐Postigo ◽  
Robert Halir ◽  
J. Gonzalo Wangüemert‐Pérez ◽  
Alejandro Ortega‐Moñux ◽  
Shurui Wang ◽  
...  
Keyword(s):  
Coupling Efficiency ◽  
Zero Order ◽  
Grating Couplers ◽  
Trade Off ◽  
Surface Grating

scholarly journals Broadband High-Efficiency Grating Couplers for Perfectly Vertical Fiber-to-Chip Coupling Enhanced by Fabry-Perot-like Cavity

Micromachines ◽  
2020 ◽  
Vol 11 (9) ◽  
pp. 859
Author(s):  
Zan Zhang ◽  
Beiju Huang ◽  
Zanyun Zhang ◽  
Chuantong Cheng ◽  
Bing Bai ◽  
...  
Keyword(s):  
High Efficiency ◽  
Coupling Efficiency ◽  
Light Sources ◽  
Feature Size ◽  
Grating Couplers ◽  
Fabrication Cost ◽  
Fabry Perot ◽  
Dimensional Parameters ◽  
Minimum Feature Size ◽  
Deep Uv

We propose a broadband high-efficiency grating coupler for perfectly vertical fiber-to-chip coupling. The up-reflection is reduced, hence enhanced coupling efficiency is achieved with the help of a Fabry-Perot-like cavity composed of a silicon nitride reflector and the grating itself. With the theory of the Fabry-Perot cavity, the dimensional parameters of the coupler are investigated. With the optimized parameters, up-reflection in the C-band is reduced from 10.6% to 5%, resulting in an enhanced coupling efficiency of 80.3%, with a 1-dB bandwidth of 58 nm, which covers the entire C-band. The minimum feature size of the proposed structure is over 219 nm, which makes our design easy to fabricate through 248 nm deep-UV lithography, and lowers the fabrication cost. The proposed design has potential in efficient and fabrication-tolerant interfacing applications, between off-chip light sources and integrated chips that can be mass-produced.

scholarly journals Reflectionless Tilted Grating Couplers With Improved Coupling Efficiency Based on a Silicon Overlay

2013 ◽  
Vol 25 (13) ◽  
pp. 1195-1198 ◽  
Author(s):  
Yanlu Li ◽  
Lianyan Li ◽  
Bin Tian ◽  
Gunther Roelkens ◽  
Roel G. Baets
Keyword(s):  
Coupling Efficiency ◽  
Grating Couplers

scholarly journals Grating Couplers on Silicon Photonics: Design Principles, Emerging Trends and Practical Issues

Micromachines ◽  
2020 ◽  
Vol 11 (7) ◽  
pp. 666 ◽  
Author(s):  
Lirong Cheng ◽  
Simei Mao ◽  
Zhi Li ◽  
Yaqi Han ◽  
H. Fu
Keyword(s):  
Optical Fibers ◽  
Silicon Photonics ◽  
High Performance ◽  
Low Cost ◽  
Coupling Efficiency ◽  
Polarization Sensitivity ◽  
Grating Couplers ◽  
Space Optics ◽  
Wavelength Sensitivity ◽  
Out Of Plane

Silicon photonics is an enabling technology that provides integrated photonic devices and systems with low-cost mass manufacturing capability. It has attracted increasing attention in both academia and industry in recent years, not only for its applications in communications, but also in sensing. One important issue of silicon photonics that comes with its high integration density is an interface between its high-performance integrated waveguide devices and optical fibers or free-space optics. Surface grating coupler is a preferred candidate that provides flexibility for circuit design and reduces effort for both fabrication and alignment. In the past decades, considerable research efforts have been made on in-plane grating couplers to address their insufficiency in coupling efficiency, wavelength sensitivity and polarization sensitivity compared with out-of-plane edge-coupling. Apart from improved performances, new functionalities are also on the horizon for grating couplers. In this paper, we review the current research progresses made on grating couplers, starting from their fundamental theories and concepts. Then, we conclude various methods to improve their performance, including coupling efficiency, polarization and wavelength sensitivity. Finally, we discuss some emerging research topics on grating couplers, as well as practical issues such as testing, packaging and promising applications.

scholarly journals Cost-effective CMOS-compatible grating couplers with backside metal mirror and 69% coupling efficiency

2012 ◽  
Vol 20 (26) ◽  
pp. B238 ◽  
Author(s):  
Wissem Sfar Zaoui ◽  
María Félix Rosa ◽  
Wolfgang Vogel ◽  
Manfred Berroth ◽  
Jörg Butschke ◽  
...  
Keyword(s):  
Coupling Efficiency ◽  
Cost Effective ◽  
Grating Couplers ◽  
Cmos Compatible

Systematic Design of a Highly Efficient Uniform Grating Coupler with Gradually Etched Depths for SOI Waveguides

2013 ◽  
Vol 663 ◽  
pp. 713-716 ◽  
Author(s):  
Jian Wei Huang ◽  
Huai Yi Chen
Keyword(s):  
Coupling Efficiency ◽  
Silicon On Insulator ◽  
Grating Coupler ◽  
Systematic Design ◽  
Grating Couplers ◽  
Fiber Coupling ◽  
Lag Effect ◽  
Coupling Angle ◽  
Etched Depth ◽  
Better Than

This study systematically designs a grating coupler with gradually etched depth on the silicon-on-insulator (SOI) substrate. We focus on the modulation design of the grating coupler with gradually etched depth. The proposed grating coupler is suitable for single TE-mode fiber coupling at the wavelength of 1.55μm. Its fiber coupling efficiency can be up to 57%, fiber coupling angle is 8o and the 1dB bandwidth is 73 nm. These results are better than those of conventional uniform grating coupler without gradually etched depth in terms of efficiency. The grating coupler proposed here is easier to design as compared with the non-uniform grating couplers using lag effect.

scholarly journals High coupling efficiency grating couplers on lithium niobate on insulator

2019 ◽  
Vol 27 (13) ◽  
pp. 17681 ◽  
Author(s):  
Inna Krasnokutska ◽  
Robert J. Chapman ◽  
Jean-Luc J. Tambasco ◽  
Alberto Peruzzo
Keyword(s):  
Lithium Niobate ◽  
Coupling Efficiency ◽  
Grating Couplers
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