Anisotropy-free arrayed waveguide gratings on X-cut thin film lithium niobate platform of in-plane anisotropy

Junjie Yi; Changjian Guo; Ziliang Ruan; Gengxin Chen; Haiqiang Wei; Liwang Lu; Shengqi Gong; Xiaofu Pan; Xiaowan Shen; Xiaowei Guan; Daoxin Dai; Kangping Zhong; Liu Liu

doi:10.1038/s41377-024-01506-1

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Anisotropy-free arrayed waveguide gratings on X-cut thin film lithium niobate platform of in-plane anisotropy

Original Articles

- Anisotropy-free arrayed waveguide gratings on X-cut thin film lithium niobate platform of in-plane anisotropy
- Light: Science & Applications Vol. 13, Issue 7, Pages: 1416-1426(2024)
- Affiliations：
  
  1.State Key Laboratory of Extreme Photonics and Instrumentation, College of Optical Science and Engineering, International Research Center for Advanced Photonics, Zhejiang University, Hangzhou 310058, China
  2.Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, South China Academy of Advanced Optoelectronics, South China Normal University, Higher-Education Mega-Center, Guangzhou 510006, China
  3.National Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, China
  4.Photonics Research Institute, Department of Electrical and Electronic Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong (SAR), China
  5.Jiaxing Key Laboratory of Photonic Sensing & Intelligent Imaging, Intelligent Optics & Photonics Research Center, Jiaxing Research Institute Zhejiang University, Jiaxing 314000, China
- Author bio：
  
  Liu Liu (liuliuopt@zju.edu.cn)
- Funds：
- DOI：10.1038/s41377-024-01506-1
  CLC：
- Published：31 July 2024，
  
  Published Online：29 June 2024，
  
  Received：29 February 2024，
  
  Revised：11 June 2024，
  
  Accepted：12 June 2024
- Accepted：
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Yi, J. J. et al. Anisotropy-free arrayed waveguide gratings on X-cut thin film lithium niobate platform of in-plane anisotropy.,Light: Science & Applications, 13, 1416-1426 (2024).
DOI：

Yi, J. J. et al. Anisotropy-free arrayed waveguide gratings on X-cut thin film lithium niobate platform of in-plane anisotropy.,Light: Science & Applications, 13, 1416-1426 (2024). DOI： 10.1038/s41377-024-01506-1.

摘要

Abstract

Arrayed waveguide grating is a versatile and scalable integrated light dispersion device

which has been widely adopted in various applications

including

optical communications and optical sensing. Recently

thin-film lithium niobate emerges as a promising photonic integration platform

due to its ability of shrinking largely the size of typical lithium niobate based optical devices. This would also enable multifunctional photonic integrated chips on a single lithium niobate substrate. However

due to the intrinsic anisotropy of the material

to build an arrayed waveguide grating on X-cut thin-film lithium niobate has never been successful. Here

a universal strategy to design anisotropy-free dispersive components on a uniaxial in-plane anisotropic photonic integration platform is introduced for the first time. This leads to the first implementation of arrayed waveguide gratings on X-cut thin-film lithium niobate with various configurations and high-performances. The best insertion loss of 2.4 dB and crosstalk of −24.1 dB is obtained for the fabricated arrayed waveguide grating devices. Applications of such arrayed waveguide gratings as a wavelength router and in a wavelength-division multiplexed optical transmission system are also demonstrated.

关键词

Keywords

references

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