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High-efficiency broad-bandwidth subwavelength grating-based fiber-chip coupler in silicon-on-insulator

Nambiar, Siddharth and Selvaraja, Shankar Kumar (2018) High-efficiency broad-bandwidth subwavelength grating-based fiber-chip coupler in silicon-on-insulator. In: OPTICAL ENGINEERING, 57 (1).

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Official URL: http://dx.doi.org/10.1117/1.OE.57.1.017115


We report a comprehensive study on the performance of uniform and nonuniform-based subwave-length 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. (C) 2018 Society of Photo-Optical Instrumentation Engineers (SPIE)

Item Type: Journal Article
Additional Information: Copy right for the article belong to SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS, 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA
Department/Centre: Division of Biological Sciences > Centre for Neuroscience
Depositing User: Id for Latest eprints
Date Deposited: 02 Mar 2018 14:49
Last Modified: 02 Mar 2018 14:49
URI: http://eprints.iisc.ac.in/id/eprint/59096

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