Large-capacity and low-loss integrated optical buffer

Temporarily storing light occupies a pivotal position in all-optical packet switching network and microwave photonics. An integrated optical buffer with large capacity and low loss is demonstrated on a silica wafer. The optical buffer consists of four silica waveguide delay lines connected by five t...

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Bibliographic Details
Published in:Optics express 2019-04, Vol.27 (8), p.11585
Main Authors: Liu, Dapeng, Sun, Shuqian, Yin, Xiaojie, Sun, Bingli, Sun, Jingwen, Liu, Yang, Li, Wei, Zhu, Ninghua, Li, Ming
Format: Article
Language:English
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Summary:Temporarily storing light occupies a pivotal position in all-optical packet switching network and microwave photonics. An integrated optical buffer with large capacity and low loss is demonstrated on a silica wafer. The optical buffer consists of four silica waveguide delay lines connected by five thermo-optic switches. With different switch combinations applied, related delay lines are selected to realize a different storage time in the buffer, and a storage time up to 100 ns with a 10-ns step size is implemented. By optimizing the fabrication process and introducing the offsets between straight and bending waveguides, the propagation loss as low as ~1.08 dB/m is achieved. This large-capacity and low-loss buffer enables broad applications in optical communications and microwave photonics.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.27.011585