Impedance matching vertical optical waveguide couplers for dense high index contrast circuits.
Impedance matching vertical optical waveguide couplers for dense high index contrast circuits.
复制标题
用于密集高折射率对比度电路的阻抗匹配垂直光波导耦合器。
DOI：
10.1364/oe.16.011682
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发表时间：
2008
期刊：
影响因子：
3.8
通讯作者：
J. Michel
中科院分区：
文献类型：
--
作者：
R. Sun;M. Beals;A. Pomerene;Jing Cheng;C. Hong;L. Kimerling;J. Michel
我们设计并演示了一种紧凑的高折射率对比度（HIC）垂直波导耦合器，用于TE单模操作，在1550 nm处的最低耦合损耗为0.20 dB +/- 0.05 dB。我们的垂直耦合器由一对垂直重叠的SOI和非晶硅制成的倒锥形结构组成。垂直耦合器可以抑制在常规定向耦合器中观察到的功率振荡，并保证垂直光阻抗匹配，对波导材料的制造和折射率变化具有很大的容限。此外，该耦合器在1460 nm和1570 nm之间显示出优异的宽带耦合效率。
We designed and demonstrated a compact, high-index contrast (HIC) vertical waveguide coupler for TE single mode operation with the lowest coupling loss of 0.20 dB +/- 0.05 dB at 1550 nm. Our vertical coupler consists of a pair of vertically overlapping inverse taper structures made of SOI and amorphous silicon. The vertical coupler can suppress power oscillation observed in regular directional couplers and guarantees vertical optical impedance matching with great tolerance for fabrication and refractive index variations of the waveguide materials. The coupler furthermore shows excellent broadband coupling efficiencies between 1460 nm and 1570 nm.