Burla Maurizio, Cortés Luis Romero, Li Ming, Wang Xu, Chrostowski Lukas, Azaña José
Opt Express. 2013 Oct 21;21(21):25120-47. doi: 10.1364/OE.21.025120.
Integrated Microwave photonics (IMWP) signal processing using Photonic Integrated Circuits (PICs) has attracted a great deal of attention in recent years as an enabling technology for a number of functionalities not attainable by purely microwave solutions. In this context, integrated waveguide Bragg grating (WBG) devices constitute a particularly attractive approach thanks to their compactness and flexibility in producing arbitrarily defined amplitude and phase responses, by directly acting on coupling coefficient and perturbations of the grating profile. In this article, we review recent advances in the field of integrated WBGs applied to MWP, analyzing the advantages leveraged by an integrated realization. We provide a perspective on the exciting possibilities offered by the silicon photonics platform in the field of MWP, potentially enabling integration of highly-complex active and passive functionalities with high yield on a single chip, with a particular focus on the use of WBGs as basic building blocks for linear filtering operations. We demonstrate the versatility of WBG-based devices by proposing and experimentally demonstrating a novel, continuously-tunable, integrated true-time-delay (TTD) line based on a very simple dual phase-shifted WBG (DPS-WBG).
近年来，利用光子集成电路（PIC）进行的集成微波光子学（IMWP）信号处理作为一种实现多种纯微波解决方案无法实现的功能的使能技术，受到了广泛关注。在这种背景下，集成波导布拉格光栅（WBG）器件是一种特别有吸引力的方法，这得益于它们在通过直接作用于光栅轮廓的耦合系数和微扰来产生任意定义的幅度和相位响应方面的紧凑性和灵活性。在本文中，我们回顾了应用于微波光子学的集成WBG领域的最新进展，分析了集成实现所利用的优势。我们展望了硅光子学平台在微波光子学领域提供的令人兴奋的可能性，这有可能在单个芯片上高产量地集成高度复杂的有源和无源功能，特别关注将WBG用作线性滤波操作的基本构建块。我们通过提出并实验演示一种基于非常简单的双相移WBG（DPS-WBG）的新型连续可调集成实时延迟（TTD）线，展示了基于WBG的器件的多功能性。
