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Optical Engineering • new

High-efficiency broad-bandwidth subwavelength grating-based fiber-chip coupler in silicon-on-insulator
Author(s): Siddharth R. Nambiar; Shankar Kumar Selvaraja
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Paper Abstract

We report a comprehensive study on the performance of uniform and nonuniform-based subwavelength grating couplers in a silicon-on-insulator. The two performance metrics, coupling efficiency, bandwidth enhancement, and tradeoffs are presented. We also present design parameters to achieve high-efficiency and broadband operation based on the detailed study of various loss mechanisms in the grating. Based on a detailed analysis, subwavelength grating coupler designs with efficiency as high as 84% with a 1-dB bandwidth of 50-nm and 98% with a 44-nm 1-dB bandwidth is presented.

Paper Details

Date Published: 31 January 2018
PDF: 7 pages
Opt. Eng. 57(1) 017115 doi: 10.1117/1.OE.57.1.017115
Published in: Optical Engineering Volume 57, Issue 1
Show Author Affiliations
Siddharth R. Nambiar, Indian Institute of Science (India)
Shankar Kumar Selvaraja, Ctr. for Nano Science and Engineering (CeNSE) (India)


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