Broadband High-Efficiency Grating Couplers for Perfectly Vertical Fiber-to-Chip Coupling Enhanced by Fabry-Perot-like Cavity

Broadband High-Efficiency Grating Couplers for Perfectly Vertical Fiber-to-Chip Coupling Enhanced by Fabry-Perot-like Cavity

We propose a broadband high-efficiency grating coupler for perfectly vertical fiber-to-chip coupling. The up-reflection is reduced, hence enhanced coupling efficiency is achieved with the help of a Fabry-Perot-like cavity composed of a silicon nitride reflector and the grating itself. With the theor...

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Bibliographic Details
Main Authors: Zan Zhang, Beiju Huang, Zanyun Zhang, Chuantong Cheng, Bing Bai, Tianxi Gao, Xiaobo Xu, Wenping Gu, Lin Zhang, Hongda Chen
Format: Article
Language:English
Published: MDPI AG 2020-09-01
Series:Micromachines
Subjects:
silicon photonics
grating coupler
Fabry-Perot cavity
photonic integrated circuit
Online Access:https://www.mdpi.com/2072-666X/11/9/859

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