A Polarization Beam Splitting-rotation-multiplexing Integrated Device with Thick Silicon Core Layer

SONG Ze-lin; CHEN He-ming

doi:10.13756/j.gtxyj.2022.06.009

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A Polarization Beam Splitting-rotation-multiplexing Integrated Device with Thick Silicon Core Layer

更新时间：2023-01-29

- A Polarization Beam Splitting-rotation-multiplexing Integrated Device with Thick Silicon Core Layer
- Study on Optical Communications Issue 6, Pages: 50-57(2022)
- 作者机构：
  
  a.南京邮电大学　电子与光学工程学院、柔性电子(未来技术)学院，南京210023
  b.南京邮电大学　贝尔英才学院，南京210023
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2022.06.009
  CLC： TN256
- Published：10 December 2022，
  
  Received：31 March 2022，
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SONG Ze-lin, CHEN He-ming. A Polarization Beam Splitting-rotation-multiplexing Integrated Device with Thick Silicon Core Layer. [J]. Study on Optical Communications (6):50-57(2022)
DOI：

SONG Ze-lin, CHEN He-ming. A Polarization Beam Splitting-rotation-multiplexing Integrated Device with Thick Silicon Core Layer. [J]. Study on Optical Communications (6):50-57(2022) DOI： 10.13756/j.gtxyj.2022.06.009.

摘要

为解决绝缘体上硅平台的偏振相关损耗和偏振相关损耗和偏振模色散问题，提高偏振分集系统的工作效率，文章提出了一种基于厚硅基波导非对称定向耦合器(ADC)和亚波长光栅(SWG)的偏振分束-旋转-合波集成器件，可以实现将任意输入光波转换为基本横电(TE

)模式的光输出。该集成器件由偏振分束器、偏振旋转器和合波器3个部分构成。运用三维有限时域差分法(3D-FDTD)进行仿真分析，对结构参数进行了优化。仿真结果表明，该器件尺寸为4.5 μm×56.0 μm，在1.55 μm的中心波长处，具有45 dB的高偏振消光比，插入损耗为0.53 dB，偏振消光比大于30 dB且插入损耗小于1 dB时，带宽为75 nm，覆盖了整个C波段。最后，分析了工艺误差对器件性能的影响。该集成器件结构紧凑，偏振消光比更高，可以满足现代光通信和光集成系统的需求。

Abstract

To solve the polarization-ralated losses and polarization mode dispersion problems of silicon on insulator platforms and to improve the efficiency of polarization diversity systems

this paper proposed a polarization beam splitting-rotation-multiplexing integrated device based on Asymmetric Directional Coupler (ADC) and Subwavelength Gratings (SWG) with a thick silicon core layer is proposed

which can convert any input light into a output light of Fundamental Transverse Electric (TE

) Mode. The integrated device consists of three parts: polarization beam splitter

polarization rotator and wave combiner. The Three-Dimensional Finite Difference Time Domain (3D-FDTD) method is used for simulation analysis

and the structural parameters are optimized. The size of the device is 4.5 μm×56.0 μm. At the input wavelength of 1.55 μm

it has a high polarization extinction ratio of 45 dB

and an insertion loss of 0.53 dB. A bandwidth of 75 nm is achieved when the polarization extinction ratio is greater than 30 dB and the insertion loss is less than 1 dB. Therefore

the operating frequency range of the device can cover the entire C-band. Finally

the influence of process error on device performance is analyzed. The integrated device has a compact structure and a higher polarization extinction ratio

which can meet the requirements of modern optical communication and optical integrated systems.

关键词

集成光学器件光波导偏振分束器偏振旋转器合波器

Keywords

integrated opticsoptical waveguidepolarization beam splitterpolarization rotatorwave combiner

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