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Narrowband reflection from integrated Bragg gratings with corrugations on long side structures

机译:长边结构上带有波纹的集成布拉格光栅的窄带反射

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An alternative approach to realize CMOS-compatible integrated Bragg gratings is proposed and implemented in this work to allow flexible control of the reflection response. To enable weak grating coupling strength in fully-etched waveguide, we employ corrugations on long side waveguides in the proposed cladding-modulated waveguides, leading to a measured reflection bandwidth of only 0.44 nm and a peak reflectivity of 96%. This grating design is relatively insensitive to the grating width variation, so within 1nm Bragg wavelength variation is also observed.
机译:在这项工作中,提出并实施了另一种实现CMOS兼容集成布拉格光栅的方法,以允许灵活控制反射响应。为了在完全蚀刻的波导中实现较弱的光栅耦合强度,我们在提出的包层调制波导中的长边波导上采用了波纹,从而导致测得的反射带宽仅为0.44 nm,峰值反射率为96%。这种光栅设计对光栅宽度变化相对不敏感,因此也可以观察到1nm以内的布拉格波长变化。

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