On-chip platform for a phased array with minimal beam divergence and wide field-of-view

被引：102

作者：

Zadka, Moshe ^{[1
]}

Chang, You-Chia ^{[1
]}

Mohanty, Aseema ^{[1
,2
]}

Phare, Christopher T. ^{[1
,2
]}

Roberts, Samantha P. ^{[1
]}

Lipson, Michal ^{[1
]}

机构：

[1] Columbia Univ, Dept Elect Engn, New York, NY 10027 USA

[2] Cornell Univ, Sch Elect & Comp Engn, Ithaca, NY 14853 USA

来源：

OPTICS EXPRESS | 2018年 / 26卷 / 03期

关键词：

UNIFORM EMISSION; GRATING COUPLER; WAVE-GUIDES; INSULATOR;

D O I：

10.1364/OE.26.002528

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Current silicon photonics phased arrays based on waveguide gratings enable beam steering with no moving parts. However, they suffer from a trade-off between beam divergence and field of view. Here, we showa platformbased on silicon-nitride/silicon that achieves simultaneously minimal beam divergence and maximum field of view while maintaining performance that is robust to fabrication variations. In addition, in order to maximize the emission from the entire length of the grating, we design the grating's strength by varying its duty cycle (apodization) to emit uniformly. We fabricate a millimeter long grating emitter with diffraction-limited beam divergence of 0.089 degrees. (c) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

引用

页码：2528 / 2534

页数：7

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