Circular polarization beam splitter based on helically twisted dual hollow-core anti-resonant fiber.

IF 3.2 2区 物理与天体物理 Q2 OPTICS
Optics express Pub Date : 2025-06-02 DOI:10.1364/OE.563295
Xiaolin Chen, Zhaoan Li, Shurui Tian, Ziqi Zheng, Yong Zhou, Xiaohui Ma, Wei Zhang, Wentan Fang, Song Huang, Lei Zhang, Weiqing Gao
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Abstract

Manipulating the spin and orbital angular momentum of light in hollow-core anti-resonant fibers has gained growing interest in the optical community. Sparked by the space-division multiplexing technologies, we have proposed a circular polarization beam splitter (CPBS) based on helically twisted dual hollow-core anti-resonant fiber (TDHC-ARF). The designed CPBS has a length of 17.47 cm, an operating bandwidth of 68 nm, a polarization extinction ratio greater than 20 dB and a higher-order mode extinction ratio exceeding 100 with the operating wavelength ranging from 1.412 to 1.48 μm. The coupling characteristics of circularly polarized eigenmodes supported in the TDHC-ARF are investigated by employing the finite-element method combined with transformation optics technique. To verify the capability of the splitter, we have developed a code to simulate the light propagation in three-dimensional TDHC-ARF based on the full-vector finite-element beam propagation method for helicoidal waveguides. It was demonstrated that when the linearly polarized Gaussian beam composed of circularly polarized lights with opposite handedness is incident from one core, the CPBS can spatially separate the incident light into orthogonal circularly polarized components in two different cores. Our work paves the way for designing the all-fiber optical devices based on hollow-core anti-resonant fiber, opening up applications in optical information processing and communication.

基于螺旋扭双空心抗谐振光纤的圆偏振分束器。
在空心抗谐振光纤中控制光的自旋和轨道角动量已经引起了光学学界越来越大的兴趣。在空分复用技术的启发下,我们提出了一种基于螺旋扭曲双空心芯抗谐振光纤(TDHC-ARF)的圆偏振分束器(CPBS)。所设计的CPBS长17.47 cm,工作带宽为68 nm,偏振消光比大于20 dB,高阶模消光比大于100,工作波长范围为1.412 ~ 1.48 μm。采用有限元法结合变换光学技术研究了TDHC-ARF中圆偏振本征模的耦合特性。为了验证分路器的性能,我们基于螺旋波导的全矢量有限元光束传播方法,开发了模拟三维TDHC-ARF中的光传播的代码。结果表明,当由相反旋向圆偏振光组成的线偏振高斯光束从一个核心入射时,CPBS可以将入射光在空间上分离为两个不同核心的正交圆偏振光分量。我们的工作为设计基于空心抗谐振光纤的全光纤器件铺平了道路,开辟了光信息处理和通信的应用领域。
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来源期刊
Optics express
Optics express 物理-光学
CiteScore
6.60
自引率
15.80%
发文量
5182
审稿时长
2.1 months
期刊介绍: Optics Express is the all-electronic, open access journal for optics providing rapid publication for peer-reviewed articles that emphasize scientific and technology innovations in all aspects of optics and photonics.
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