Compact grating couplers between optical fibers and Silicon-on-Insulator photonic wire waveguides with 69% coupling efficiency

2006 ◽  
Author(s):  
F. van Laere ◽  
G. Roelkens ◽  
J. Schrauwen ◽  
D. Taillaert ◽  
P. Dumon ◽  
...  
Keyword(s):  
Optical Fibers ◽  
Coupling Efficiency ◽  
Silicon On Insulator ◽  
Grating Couplers ◽  
Photonic Wire

scholarly journals Novel Low-Loss Fiber-Chip Edge Coupler for Coupling Standard Single Mode Fibers to Silicon Photonic Wire Waveguides

Photonics ◽  
2021 ◽  
Vol 8 (3) ◽  
pp. 79
Author(s):  
Siwei Sun ◽  
Ying Chen ◽  
Yu Sun ◽  
Fengman Liu ◽  
Liqiang Cao
Keyword(s):  
Optical Fibers ◽  
Silicon Photonics ◽  
Coupling Efficiency ◽  
Single Mode ◽  
Spot Size ◽  
Silicon On Insulator ◽  
Multiple Structure ◽  
Silicon Photonic ◽  
Mode Size ◽  
Photonic Wire

Fiber-to-chip optical interconnects is a big challenge in silicon photonics application scenarios such as data centers and optical transmission systems. An edge coupler, compared to optical grating, is appealing to in the application of silicon photonics due to the high coupling efficiency between standard optical fibers (SMF-28) and the sub-micron silicon wire waveguides. In this work, we proposed a novel fiber–chip edge coupler approach with a large mode size for silicon photonic wire waveguides. The edge coupler consists of a multiple structure which was fulfilled by multiple silicon nitride layers embedded in SiO2 upper cladding, curved waveguides and two adiabatic spot size converter (SSC) sections. The multiple structure can allow light directly coupling from large mode size fiber-to-chip coupler, and then the curved waveguides and SSCs transmit the evanescent field to a 220 nm-thick silicon wire waveguide based on the silicon-on-insulator (SOI) platform. The edge coupler, designed for a standard SMF-28 fiber with 8.2 μm mode field diameter (MFD) at a wavelength of 1550 nm, exhibits a mode overlap efficiency exceeding 95% at the chip facet and the overall coupling exceeding 90%. The proposed edge coupler is fully compatible with standard microfabrication processes.

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.

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.

Fabrication of Lensed Plastic Optical Fiber Array Using Electrostatic Force

2011 ◽  
Vol 133 (3) ◽  
Author(s):  
Yih-Tun Tseng ◽  
Jhong-Bin Huang ◽  
Che-Hsin Lin ◽  
Chin-Lung Chen ◽  
Wood-Hi Cheng
Keyword(s):  
Optical Fiber ◽  
Optical Fibers ◽  
Electrostatic Force ◽  
Coupling Efficiency ◽  
Numerical Aperture ◽  
Uv Curing ◽  
Power Budget ◽  
Fiber Array ◽  
Plastic Optical Fibers ◽  
Efficient Coupling

The GI (graded-index) POFs (Plastic optical fibers), which has been proven to reach distances as long as 1 km at 1.25 Gb/s has a relatively low numerical aperture . Therefore, the efficient coupling of GI POFs to the light source has become critical to the power budget in the system. Efficient coupling for a POFs system normally involves either a separate lens or the direct formation of the lens at the end of the fiber. Forming the lens-like structure directly on the fiber end is preferred for simplicity of fabrication and packaging, such as polishing and fusion, combine different fibers with the cascaded fiber method and hydroflouride (HF) chemical etching. These approaches are well established, but applicable only to glass. Optical assembly architecture for multichannel fibers and optical devices is critical to optical fiber interconnections. Multichannel fiber-pigtail laser diode (LD) modules have potential for supporting higher data throughput and longer transmission distances. However, to be of practical use, these modules must be more precise. This work proposes and manufactures lensed plastic optical fibers (LPOF) array. This novel manipulation can be utilized to fabricate an aspherical lens on a fiber array after the UV curing of the photo-sensitive polymer; the coupling efficiency (CE) is increased and exceeds 47% between the LD array and the fiber array.

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 Stimulated and spontaneous four-wave mixing in silicon-on-insulator coupled photonic wire nano-cavities

2013 ◽  
Vol 103 (3) ◽  
pp. 031117 ◽  
Author(s):  
Stefano Azzini ◽  
Davide Grassani ◽  
Matteo Galli ◽  
Dario Gerace ◽  
Maddalena Patrini ◽  
...  
Keyword(s):  
Four Wave Mixing ◽  
Silicon On Insulator ◽  
Wave Mixing ◽  
Photonic Wire
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