Efficient coupling of narrow beams into polyimide waveguides by means of grating couplers with high-index coating

被引：14

作者：

Bruck, Roman ^{[1
]}

Hainberger, Rainer ^{[1
]}

机构：

[1] AIT Austrian Inst Technol GmbH, Hlth & Environm Dept, Nano Syst, A-1220 Vienna, Austria

来源：

APPLIED OPTICS | 2010年 / 49卷 / 10期

关键词：

D O I：

10.1364/AO.49.001972

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The effect of a thin high-index coating deposited on polyimide waveguide grating couplers was investigated. A comprehensive numerical study was performed using an efficient simulation tool based on a Floquet-Bloch algorithm, and the results of this study were compared with experimentally obtained values for input coupling efficiencies. The application of a high-index coating permits efficient coupling from narrow beams even in material systems with a low index difference. This not only facilitates a denser integration of grating couplers but also permits low-loss lateral tapering to single-mode waveguides. (C) 2010 Optical Society of America

引用

页码：1972 / 1978

页数：7

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