基于石墨烯辅助金属光栅的O波段和c波段全光纤可调谐偏振滤波器

IF 1.8 4区 物理与天体物理 Q3 OPTICS
YUE WANG, Zhuo Wang, jiaqi qu, Zhi Cheng, Dongmei HUANG, Changyuan Yu
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引用次数: 0

摘要

全光纤偏振滤波器在光通信、传感和光纤激光等领域有着重要的应用。然而,高消光比和短相互作用长度之间的不兼容性是小型化的一个问题。此外,目前的无源设计使偏振滤波器工作在固定波段,这限制了动态偏振控制。在此,我们将亚波长金属光栅集成在石墨烯覆盖的d型单模光纤上,实现了可调谐偏振滤波器,其工作带宽比以往的工作带宽有了显著的提高。在模拟中,x偏振模式与表面等离激元极化模式有效耦合,并且具有极高的传输损耗(高达~ 38dB/mm)。同时,y极化模式保持低插入损耗,约0.58dB/mm。通过改变石墨烯的化学势,可以在1.272 ~ 1.353µm或1.54 ~ 1.612µm的波长范围内调节x偏振模式的损耗峰,从而得到消光比超过20 dB的可调宽带滤波器。该滤波器为通信、传感和激光领域的集成器件提供了一种很有前途的偏振控制方案。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Tunable all-fiber polarization filter based on graphene-assisted metal grating for O- and C-bands
All-fiber polarization filters have important applications in optical communication, sensing, and fiber lasing. However, the incompatibility between high extinction ratio and short interaction length is a problem for miniaturization. In addition, current passive designs make polarization filters work in a fixed wavelength band, which limits the dynamic polarization control. Here, we integrate subwavelength metal gratings on graphene-covered D-shaped single-mode fibers to achieve tunable polarization filters, whose operating bandwidth has a significant improvement over previous works. In the simulation, the x -polarized mode couples effectively with the surface plasmon polariton mode and suffers extremely high transmission loss (up to ∼38dB/mm). At the same time, the y -polarized mode remains low insertion loss of ∼0.58dB/mm. By changing the chemical potential of graphene, the loss peak of the x -polarized mode can be adjusted in the range covering the wavelength bands from 1.272 to 1.353 µm or from 1.54 to 1.612 µm, which results in an adjustable broadband filter with a high extinction ratio over 20 dB. The proposed filter provides a promising polarization control scheme for integrated devices in the fields of communication, sensing, and lasing.
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来源期刊
CiteScore
4.00
自引率
5.30%
发文量
374
审稿时长
2.1 months
期刊介绍: The Journal of the Optical Society of America B (JOSA B) is a general optics research journal that complements JOSA A. It emphasizes scientific research on the fundamentals of the interaction of light with matter such as quantum optics, nonlinear optics, and laser physics. Topics include: Advanced Instrumentation and Measurements Fiber Optics and Fiber Lasers Lasers and Other Light Sources from THz to XUV Light-Induced Phenomena Nonlinear and High Field Optics Optical Materials Optics Modes and Structured Light Optomechanics Metamaterials Nanomaterials Photonics and Semiconductor Optics Physical Optics Plasmonics Quantum Optics and Entanglement Quantum Key Distribution Spectroscopy and Atomic or Molecular Optics Superresolution and Advanced Imaging Surface Optics Ultrafast Optical Phenomena Wave Guiding and Optical Confinement JOSA B considers original research articles, feature issue contributions, invited reviews and tutorials, and comments on published articles.
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