Dahlem Marcus S, Holzwarth Charles W, Khilo Anatol, Kärtner Franz X, Smith Henry I, Ippen Erich P
Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
Opt Express. 2011 Jan 3;19(1):306-16. doi: 10.1364/OE.19.000306.
We report the fabrication of a reconfigurable wide-band twenty-channel second-order dual filterbank, defined on a silicon-on-insulator (SOI) platform, with tunable channel spacing and 20 GHz single-channel bandwidth. We demonstrate the precise tuning of eleven (out of the twenty) channels, with a channel spacing of 124 GHz (~1 nm) and crosstalk between channels of about -45 dB. The effective thermo-optic tuning efficiency is about 27 μW/GHz/ring. A single channel of a twenty-channel counter-propagating filterbank is also demonstrated, showing that both propagating modes exhibit identical filter responses. Considerations about thermal crosstalk are also presented. These filterbanks are suitable for on-chip wavelength-division-multiplexing applications, and have the largest-to-date reported number of channels built on an SOI platform.
我们报告了一种可重构宽带二十通道二阶双滤波器组的制造，该滤波器组基于绝缘体上硅（SOI）平台定义，具有可调的通道间距和20 GHz的单通道带宽。我们展示了二十个通道中的十一个通道的精确调谐，通道间距为124 GHz（约1 nm），通道间串扰约为 -45 dB。有效热光调谐效率约为27 μW/GHz/环。还展示了二十通道反向传播滤波器组的单个通道，表明两种传播模式都表现出相同的滤波器响应。同时也介绍了关于热串扰的考虑因素。这些滤波器组适用于片上波分复用应用，并且是在SOI平台上构建的通道数量迄今最多的。
