Broadband on-chip optical non-reciprocity using phase modulators
Broadband on-chip optical non-reciprocity using phase modulators
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DOI：
10.1364/oe.21.014500
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发表时间：
2013-06-17
期刊：
影响因子：
3.8
通讯作者：
Hochberg, Michael
中科院分区：
文献类型：
--
作者：
Galland, Christophe;Ding, Ran;Hochberg, Michael
打破光在纳米级光子集成电路(PIC)中传播的互易性是一个密集研究的主题，这项技术在从经典和量子光学的实验研究到高速电信和数据互连等领域的前景推动了这一主题。特别是，在与现有的互补金属氧化物半导体(Cmos)基础设施兼容的工艺中制造的硅PIC已经引起了显著的关注。然而，在当前的cmos工艺中集成光隔离器和环行器的实用解决方案仍然难以捉摸。在这里，我们介绍了一种新的非互易光子电路，它工作在标准的单模波导或光纤中。我们的设计利用了传统的相位调制器获得的随时间变化的折射率调制，例如在硅光子学平台中广泛使用的相位调制器。因为它是基于完全平衡的干涉仪，并且不涉及谐振结构，所以我们的方案本质上也是宽带的。利用实际参数，计算出消光比优于20dB，插入损耗小于3dB。(C)2013年美国光学学会
Breaking the reciprocity of light propagation in a nanoscale photonic integrated circuit (PIC) is a topic of intense research, fostered by the promises of this technology in areas ranging from experimental research in classical and quantum optics to high-rate telecommunications and data interconnects. In particular, silicon PICs fabricated in processes compatible with the existing complementary metal-oxide-semiconductor (CMOS) infrastructure have attracted remarkable attention. However, a practical solution for integrating optical isolators and circulators within the current CMOS technology remains elusive. Here, we introduce a new nonreciprocal photonic circuit operating with standard single-mode waveguides or optical fibers. Our design exploits a time-dependent index modulation obtained with conventional phase modulators such as the one widely available in silicon photonics platforms. Because it is based on fully balanced interferometers and does not involve resonant structures, our scheme is also intrinsically broadband. Using realistic parameters we calculate an extinction ratio superior to 20dB and insertion loss below 3dB. (C)2013 Optical Society of America