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Title: Ultra compact Bragg grating devices with broadband selectivity

Abstract

Current silicon waveguide Bragg gratings typically introduce perturbation to the optical mode in the form of modulation of the waveguide width or cladding. However, since such a perturbation approach is limited to weak perturbations to avoid intolerable scattering loss and higher-order modal coupling, it is difficult to produce ultra-wide stopbands. In this Letter, we report an ultra-compact Bragg grating device with strong perturbations by etching nanoholes in the waveguide core to enable an ultra-large stopband with apodization achieved by proper location of the nanoholes. With this approach, a 15 µm long device can generate a stopband as wide as 110 nm that covers the entire C + L band with a 40 dB extinction ratio and over a 10 dB sidelobe suppression ratio (SSR). Similar structures can be further optimized to achieve higher SSR of > <#comment/> 17 d B for a stopband of about 80 nm.

Authors:
ORCiD logo; ORCiD logo;
Publication Date:
Sponsoring Org.:
USDOE Advanced Research Projects Agency - Energy (ARPA-E)
OSTI Identifier:
1594209
Grant/Contract Number:  
LEED: A Lightwave Energy-Efficient Datacenter
Resource Type:
Publisher's Accepted Manuscript
Journal Name:
Optics Letters
Additional Journal Information:
Journal Name: Optics Letters Journal Volume: 45 Journal Issue: 3; Journal ID: ISSN 0146-9592
Publisher:
Optical Society of America
Country of Publication:
United States
Language:
English

Citation Formats

Li, Ang, Davis, Jordan, and Fainman, Yeshaiahu. Ultra compact Bragg grating devices with broadband selectivity. United States: N. p., 2020. Web. doi:10.1364/OL.384688.
Li, Ang, Davis, Jordan, & Fainman, Yeshaiahu. Ultra compact Bragg grating devices with broadband selectivity. United States. https://doi.org/10.1364/OL.384688
Li, Ang, Davis, Jordan, and Fainman, Yeshaiahu. Tue . "Ultra compact Bragg grating devices with broadband selectivity". United States. https://doi.org/10.1364/OL.384688.
@article{osti_1594209,
title = {Ultra compact Bragg grating devices with broadband selectivity},
author = {Li, Ang and Davis, Jordan and Fainman, Yeshaiahu},
abstractNote = {Current silicon waveguide Bragg gratings typically introduce perturbation to the optical mode in the form of modulation of the waveguide width or cladding. However, since such a perturbation approach is limited to weak perturbations to avoid intolerable scattering loss and higher-order modal coupling, it is difficult to produce ultra-wide stopbands. In this Letter, we report an ultra-compact Bragg grating device with strong perturbations by etching nanoholes in the waveguide core to enable an ultra-large stopband with apodization achieved by proper location of the nanoholes. With this approach, a 15 µm long device can generate a stopband as wide as 110 nm that covers the entire C + L band with a 40 dB extinction ratio and over a 10 dB sidelobe suppression ratio (SSR). Similar structures can be further optimized to achieve higher SSR of > <#comment/> 17 d B for a stopband of about 80 nm.},
doi = {10.1364/OL.384688},
journal = {Optics Letters},
number = 3,
volume = 45,
place = {United States},
year = {2020},
month = {1}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1364/OL.384688

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Cited by: 4 works
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