The ever-increasing demand for high speed and large bandwidth has made photonic systems a leading candidate for the next generation of telecommunication and radar technologies. The photonic platform enables high performance while maintaining a small footprint and provides a natural interface with fiber optics for signal transmission. However, producing sharp, narrow-band filters that are competitive with RF components has remained challenging. In this paper, we demonstrate all-silicon RF-photonic multi-pole filters with ∼100× higher spectral resolution than previously possible in silicon photonics. This enhanced performance is achieved utilizing engineered Brillouin interactions to access long-lived phonons, greatly extending the available coherence times in silicon. This Brillouin-based optomechanical system enables ultra-narrow (3.5 MHz) multi-pole response that can be tuned over a wide (∼10 GHz) spectral band. We accomplish this in an all-silicon optomechanical waveguide system, using CMOS-compatible fabrication techniques. In addition to bringing greatly enhanced performance to silicon photonics, we demonstrate reliability and robustness, necessary to transition silicon-based optomechanical technologies from the scientific bench-top to high-impact field-deployable technologies.

中文翻译：

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硅中带外抑制高的可调谐微波光子滤波

对高速和大带宽的不断增长的需求使光子系统成为下一代电信和雷达技术的领先候选者。该光子平台可在保持较小占地面积的同时实现高性能，并提供与光纤的自然接口以进行信号传输。然而，生产与RF组件竞争的尖锐，窄带滤波器仍然具有挑战性。在本文中，我们演示了全硅RF光子多极滤波器，其光谱分辨率比以前在硅光子学中的光谱分辨率高约100倍。利用工程化的布里渊相互作用来访问长寿命的声子，可以提高性能，从而大大延长了硅中的可用相干时间。这种基于布里渊的光机械系统可实现超窄（3。可以在很宽的频谱范围（〜10 GHz）上进行调谐的5 MHz）多极点响应。我们使用兼容CMOS的制造技术在全硅光机械波导系统中完成此任务。除了使硅光子学性能大大提高之外，我们还展示了可靠性和鲁棒性，这是将基于硅的光机械技术从科学台式技术转变为高影响力的可现场部署技术所必需的。