Wideband group velocity independent coupling into slow light silicon photonic crystal waveguide

被引：44

作者：

Lin, Che-Yun ^{[1
]}

Wang, Xiaolong ^{[2
]}

Chakravarty, Swapnajit ^{[2
]}

Lee, Beom Suk ^{[1
]}

Lai, Wei-Cheng ^{[1
]}

Chen, Ray T. ^{[1
]}

机构：

[1] Univ Texas Austin, Dept Elect & Comp Engn, Austin, TX 78712 USA

[2] Omega Opt Inc, Austin, TX 78759 USA

来源：

APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 18期

关键词：

TRANSMISSION; MODE;

D O I：

10.1063/1.3513814

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We experimentally demonstrate efficient optical coupling into a slow light photonic crystal waveguide (PCW) that is independent of the group velocity of the guided mode. With a group index taper to match the group velocity between a strip waveguide and a PCW, the optical coupling efficiency is nearly constant throughout the spectrum of the defect-mode, including the slow light region near the band edge. Compared to strip-PCW butt-coupling without a group index taper, our measurement results show a 20 dB enhancement in coupling efficiency with 5 dB less Fabry-Perot fluctuations. The measurements show excellent agreement with two-dimensional finite-difference time domain simulations. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3513814]

引用

页数：3

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