Achromatic Silicon Photonic Waveguide Lenses for Ultra‐Broadband Multimode Spot‐Size Conversion

The rapid development of silicon photonics inspired the emergence of on‐chip geometric optics. As one of the most crucial elements, waveguide‐lenses have attracted much attention. Nevertheless, waveguide‐lenses often suffer from large chromatism due to the strong waveguide dispersion, especially for...

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Bibliographic Details
Published in:Laser & photonics reviews 2024-09
Main Authors: Liu, Ruoran, Zhao, Weike, Dai, Daoxin
Format: Article
Language:English
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Summary:The rapid development of silicon photonics inspired the emergence of on‐chip geometric optics. As one of the most crucial elements, waveguide‐lenses have attracted much attention. Nevertheless, waveguide‐lenses often suffer from large chromatism due to the strong waveguide dispersion, especially for the cases with multiple guided‐modes. In this paper, achromatic waveguide‐lenses available for multimode photonics are proposed and are further utilized for realizing multimode spot size converters (MSSCs) as an example. The present MSSC shows low excess losses < 0.4 dB and low inter‐mode crosstalks
ISSN:1863-8880
1863-8899
DOI:10.1002/lpor.202301194