On-chip tunable photonic delay line
On-chip tunable photonic delay line
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DOI：
10.1063/1.5111164
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发表时间：
2019-09-01
期刊：
影响因子：
5.6
通讯作者：
Lipson, Michel
中科院分区：
文献类型：
--
作者：
Ji, Xingchen;Yao, Xinwen;Lipson, Michel
片上可调谐光子延迟线是传感、成像和光通信等应用的关键构件。然而，在小尺寸内实现长且可调谐的延迟线仍然具有挑战性。在这里，我们展示了一个片上可调谐光子延迟线使用超低损耗高限制氮化硅波导集成微加热器。作为潜在应用的一个例子，我们嵌入一个0.4米的延迟线内的光学相干断层扫描（OCT）系统。我们表明，延迟线可以延长0.6 mm的OCT成像范围，同时保持高的信噪比。我们的可调谐光子延迟线实现了没有任何移动部件，可以提供高稳定性，对基于干扰的应用至关重要。
An on-chip tunable photonic delay line is a key building block for applications including sensing, imaging, and optical communication. However, achieving long and tunable delay lines within a small footprint remains challenging. Here, we demonstrate an on-chip tunable photonic delay line using ultralow loss high confinement Si3N4 waveguides with integrated microheaters. As an example of potential application, we embed a 0.4 m delay line within an optical coherence tomography (OCT) system. We show that the delay line can extend the OCT imaging range by 0.6 mm while maintaining a high signal to noise ratio. Our tunable photonic delay line is achieved without any moving parts which could provide high stability, critical for interference based applications.