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https://hdl.handle.net/2440/137604
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Type: | Journal article |
Title: | Multimode Waveguide Bends in Lithium Niobate on Insulator |
Author: | Ma, M. Yuan, M. Zhou, X. Xiao, H. Cao, P. Cheng, L. Nguyen, T.G. Boes, A. Ren, G. Su, Y. Mitchell, A. Tian, Y. |
Citation: | Laser and Photonics Reviews, 2023; 17(5):2200862-1-2200862-7 |
Publisher: | Wiley |
Issue Date: | 2023 |
ISSN: | 1863-8880 1863-8899 |
Statement of Responsibility: | Mingyang Ma, Mingrui Yuan, Xudong Zhou, Huifu Xiao, Pengfei Cao, Lin Cheng, Thach Giang Nguyen, Andreas Boes, Guanghui Ren, Yikai Su, Arnan Mitchell, and Yonghui Tian |
Abstract: | Lithium niobate on insulator (LNOI) is a promising platform for realizing high-performance photonic integrated circuits (PICs) for communication applications due to LN’s excellent electro-optic properties. Multimode photonic devices are attractive as they can improve the communication capacity of PICs by multiplexing orthogonal modes. For connecting multimode photonic components on the same chip, multimode waveguide bends are indispensable. In this contribution, multimode waveguide bends are proposed, simulated, and experimentally demonstrated with double air grooves to ensure low crosstalk for three different transverse electric (TE) modes by improving the mode overlap at the interface between the straight and bent waveguide when the waveguide is bent. This enables demonstration of S-shaped waveguide bends (two 90o bent waveguides) with insertion losses below 1.42, 1.12, and 2.5 dB in the wavelength range of 1525–1575 nm for the transmitted TE0, TE1, and TE2 modes, respectively. The mode crosstalk is lower than −12.2 dB for all three modes. The demonstrated device provides a compact solution for multimode waveguide bends in the LNOI platform, paving the way for high-speed, high-data-capacity PICs for on-chip communication systems. |
Keywords: | Lithium niobate on insulator; silicon nitride; multimode waveguide bends; microstructure |
Description: | Published May 2023 |
Rights: | © 2023 Wiley-VCH GmbH. |
DOI: | 10.1002/lpor.202200862 |
Grant ID: | http://purl.org/au-research/grants/arc/DP190102773 |
Published version: | http://dx.doi.org/10.1002/lpor.202200862 |
Appears in Collections: | Electrical and Electronic Engineering publications IPAS publications |
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