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arXiv 2408.04039physics.opticsphysics.app-ph
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基于亚波长Y结的宽带模式交换器

Broadband mode exchanger based on subwavelength Y-junctions

Raquel Fernández de Cabo, Alejandro Sánchez-Sánchez, Yijun Yang, Daniele Melati, Carlos Alonso-Ramos, Aitor V. Velasco, David González-Andrade

AI总结:

本文提出一种基于亚波长光栅超材料和对称Y结的紧凑型宽带模式交换器,通过色散工程在1420-1620 nm范围内实现低损耗和低串扰的模式交换。

摘要:

多模硅光子技术利用模分复用技术,在提高大规模多处理系统用于片上光互连的容量方面展现出巨大潜力。这些技术不仅对电信和数据通信应用具有重要意义,而且对量子光子学和非线性光子学等前沿领域也有深远影响。因此,开发紧凑、低损耗和低串扰的多模器件,尤其是模式交换器,对于实现有效的片上模式操控至关重要。本工作提出了一种新型模式交换器,该器件利用亚波长光栅超材料与对称Y结的特性,在宽带宽内实现了低损耗和低串扰,且尺寸紧凑,仅为6.5 μm × 2.6 μm。在我们的设计中集成SWG纳米结构,通过臂和超材料中不同的传播常数实现对模式交换的精确控制,并利用色散工程展宽工作带宽。实验表征表明,据我们所知,该器件实现了覆盖1420 nm至1620 nm的最宽工作带宽,测得损耗低至0.5 dB,消光比高于10 dB。在149 nm带宽(1471-1620 nm)内性能进一步提升,测得损耗低于0.4 dB,消光比大于18 dB。

英文摘要:

Multimode silicon photonics, leveraging mode-division multiplexing technologies, offers significant potential to increase capacity of large-scale multiprocessing systems for on-chip optical interconnects. These technologies have implications not only for telecom and datacom applications, but also for cutting-edge fields such as quantum and nonlinear photonics. Thus, the development of compact, low-loss and low-crosstalk multimode devices, in particular mode exchangers, is crucial for effective on-chip mode manipulation. This work introduces a novel mode exchanger that exploits the properties of subwavelength grating metamaterials and symmetric Y-junctions, achieving low losses and crosstalk over a broad bandwidth and a compact size of only 6.5 μm {\times} 2.6 μm. The integration of SWG nanostructures in our design enables precise control of mode exchange through different propagation constants in the arms and metamaterial, and takes advantage of dispersion engineering to broaden the operating bandwidth. Experimental characterization demonstrates, to the best of our knowledge, the broadest operational bandwidth covering from 1420 nm to 1620 nm, with measured losses as low as 0.5 dB and extinction ratios higher than 10 dB. Enhanced performance is achieved within a 149 nm bandwidth (1471-1620 nm), showing measured losses below 0.4 dB and extinction ratios greater than 18 dB.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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