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首页> 外文期刊>Optics Letters >Bandwidth-adaptable silicon photonic differentiator employing a slow light effect
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Bandwidth-adaptable silicon photonic differentiator employing a slow light effect

机译：采用慢光效果的带宽自适应硅光子微分器

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摘要

A photonic differentiator (DIFF) plays a crucial role in photonic circuits. Despite the fact that a DIFF having a tera-hertz bandwidth has been reported, the practical bandwidth is limited to being a bandpass response. In this Letter, we propose the concept of a bandwidth-adaptable DIFF, which exploits the slow light effect in a photonic crystal waveguide (PhCW) to overcome the inherent bandwidth limitation of current photonic DIFFs. We fabricated a PhCW Mach-Zehnder interferometer (PhCW-MZI) on the silicon-onisolator material platform to validate our concept. Input Gaussian pulses with full width to half-maximums (FWHMs) ranging from 2.7 to 81.4 ps are accurately differentiated using our PhCW-MZI. Our all-passive scheme circumvents the bandwidth bottlenecks of previously reported photonic DIFFs and can greatly broaden the application area of photonic DIFFs. (C) 2017 Optical Society of America
机译：光子微分器（DIFF）在光子电路中起着至关重要的作用。尽管已经报道了具有太赫兹带宽的 DIFF，但实际带宽仅限于带通响应。在这封信中，我们提出了带宽自适应DIFF的概念，它利用光子晶体波导（PhCW）中的慢光效应来克服当前光子DIFF固有的带宽限制。我们在硅离子体材料平台上制造了PhCW马赫-曾德尔干涉仪（PhCW-MZI），以验证我们的概念。使用我们的PhCW-MZI可以准确区分全宽至半极值（FWHM）范围为2.7至81.4 ps的输入高斯脉冲。我们的全无源方案规避了先前报道的光子DIFF的带宽瓶颈，可以大大拓宽光子DIFF的应用领域。（C） 2017年美国光学学会

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