In this letter, we propose and experimentally validate a resonance enhanced center-symmetric structure to increase the optical bandwidth of waveguide grating couplers. Our experimental results demonstrate state of the art performance in increasing the 1dB optical bandwidth of perfectly vertical grating couplers to 121 nm for standard single mode fiber.

中文翻译：

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用于高效、完美垂直耦合的谐振增强宽带光栅

在这封信中，我们提出并通过实验验证了一种共振增强中心对称结构，以增加波导光栅耦合器的光学带宽。我们的实验结果证明了将标准单模光纤的完全垂直光栅耦合器的 1dB 光学带宽增加到 121 nm 的最先进性能。