Next Article in Journal
A High-Efficiency Super-Resolution Reconstruction Method for Ultrasound Microvascular Imaging
Previous Article in Journal
In-Situ Strain Measurements in Large Volumes of Hardening Epoxy Using Optical Backscatter Reflectometry
Article Menu
Issue 7 (July) cover image

Export Article

Open AccessFeature PaperArticle
Appl. Sci. 2018, 8(7), 1142;

Grating-Assisted Fiber to Chip Coupling for SOI Photonic Circuits

Centre for Nano Science and Engineering, Indian Institute of Science, Bengaluru 560012, India
Author to whom correspondence should be addressed.
Received: 24 May 2018 / Revised: 2 July 2018 / Accepted: 3 July 2018 / Published: 13 July 2018
(This article belongs to the Special Issue Photonic Integration: Recent Advances and Applications)
Full-Text   |   PDF [2744 KB, uploaded 13 July 2018]   |  


Fiber to chip coupling is a critical aspect of any integrated photonic circuit. In terms of ease of fabrication as well as wafer-scale testability, surface grating couplers are by far the most preferred scheme of the coupling to integrated circuits. In the past decade, considerable effort has been made for designing efficient grating couplers on Silicon-on-Insulator (SOI) and other allied photonic platforms. Highly efficient grating couplers with sub-dB coupling performance have now been demonstrated. In this article, we review the recent advances made to develop grating coupler designs for a variety of applications on SOI platform. We begin with a basic overview of design methodology involving both shallow etched gratings and the emerging field of subwavelength gratings. The feasibility of reducing footprint by way of incorporating compact tapers is also explored. We also discuss novel grating designs like polarization diversity as well as dual band couplers. Lastly, a brief description of various packaging and wafer-scale testing schemes available for fiber-chip couplers is elaborated. View Full-Text
Keywords: grating couplers; SOI; subwavelength gratings; compact tapers grating couplers; SOI; subwavelength gratings; compact tapers

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Nambiar, S.; Sethi, P.; Selvaraja, S.K. Grating-Assisted Fiber to Chip Coupling for SOI Photonic Circuits. Appl. Sci. 2018, 8, 1142.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Appl. Sci. EISSN 2076-3417 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top