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

Siddharth R. Nambiar; Shankar Kumar Selvaraja

doi:10.1117/1.OE.57.1.017115

31 January 2018 High-efficiency broad-bandwidth subwavelength grating-based fiber-chip coupler in silicon-on-insulator

Siddharth R. Nambiar, Shankar Kumar Selvaraja

Author Affiliations +

Optical Engineering, Vol. 57, Issue 1, 017115 (January 2018). https://doi.org/10.1117/1.OE.57.1.017115

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.

Citation Download Citation

Siddharth R. Nambiar and Shankar Kumar Selvaraja "High-efficiency broad-bandwidth subwavelength grating-based fiber-chip coupler in silicon-on-insulator," Optical Engineering 57(1), 017115 (31 January 2018). https://doi.org/10.1117/1.OE.57.1.017115

Received: 17 September 2017; Accepted: 9 January 2018; Published: 31 January 2018

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