Broadband Athermal Waveguides and Resonators with Low Anomalous Dispersion
Name
Broadband_Athermal_Waveguides_and_Resonators_With_Low_Anomalous_Dispersion.pdf
Description
Published version
Size
63.69 KB
Format
Adobe PDF
Checksum (MD5)
0cdfbade58b5980e53eb336ff85873d3
Author(s)
Xu, Lijuan
Guo, Yuhao
Wang, Jing
Han, Zhaohong
Liu, Henan
Michel, Jurgen
Kimerling, Lionel C
Zhang, Lin
Date Issued
2021
Journal
IEEE Access
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Citation
Xu, Lijuan, Guo, Yuhao, Wang, Jing, Han, Zhaohong, Liu, Henan et al. 2021. "Broadband Athermal Waveguides and Resonators with Low Anomalous Dispersion." IEEE Access, 9.
Version
Final published version
Abstract
© 2013 IEEE. To mitigate the temperature sensitivity of photonic devices, materials with a negative thermo-optical coefficient (TOC) are integrated to optical waveguides. However, previously reported waveguides are made athermal at only one wavelength. In this paper, we theoretically propose a new broadband athermal waveguide, which consists of TiO2 with a negative TOC and SiC with a positive TOC in its core. This composite core shows a near-zero broadband effective TOC, i.e., ±1 × 10-6/K over a 780-nm bandwidth from 1280 to 2060 nm. Furthermore, it also has low anomalous dispersion, from 66 to 329 ps/nm/km in the same wavelength range. This new athermal waveguide, when used to form microresonators, enables us to achieve broadband nonlinear applications with negligible intra-cavity thermal dynamics on a chip. We also show that the proposed waveguide can be tightly bent without suffering from a large bending loss/substrate leakage, which is suitable for dense integration.
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Creative Commons Attribution 4.0 International License
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DOI of Published Version
https://doi.org/10.1109/ACCESS.2020.3048152
