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

被引：13
|
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
收藏
页码：1972 / 1978
页数：7
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