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一种新型镀金 V 型双芯光子晶体光纤偏振分束器，覆盖 E + S + C + L + U 波段。

A Novel Gold Film-Coated V-Shape Dual-Core Photonic Crystal Fiber Polarization Beam Splitter Covering the E + S + C + L + U Band.

机构信息

State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China.

Research Center for Convergence Networks and Ubiquitous Services, University of Science & Technology Beijing (USTB), Beijing 100083, China.

出版信息

Sensors (Basel). 2021 Jan 12;21(2):496. doi: 10.3390/s21020496.

DOI:10.3390/s21020496
PMID:33445618
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7826817/
Abstract

In this paper, a novel gold film-coated V-shape dual-core photonic crystal fiber (V-DC-PCF) polarization beam splitter (PBS) based on surface plasmon resonance effect is proposed. The coupling lengths of the X-polarization (X-pol) and Y-polarization (Y-pol) and the corresponding coupling length ratio of the proposed V-DC-PCF PBS without gold film and with gold film are compared. The fiber structure parameters and thickness of the gold film are optimized through investigating their effects on the coupling lengths and coupling length ratio. As the propagation length increases, the normalized output powers of the X-pol and Y-pol of the proposed V-DC-PCF PBS at the three wavelengths 1.610, 1.631, and 1.650 μm are demonstrated. The relationships between the extinction ratio (ER), insertion loss (IL) and wavelength for the three splitting lengths (SLs) 188, 185, and 182 μm are investigated. Finally, it is demonstrated that for the proposed V-DC-PCF PBS, the optimal SL is 188 μm, the ILs of the X-pol and Y-pol are less than 0.22 dB, and the splitting bandwidth (SB) can cover the E + S + C + L + U band. The proposed V-DC-PCF PBS has the ultra-short SL, ultra-wide SB, and ultra-low IL, so it is expected to have important applications in the laser, sensing, and dense wavelength division multiplexing systems.

摘要

本文提出了一种基于表面等离子体共振效应的新型镀金 V 型双芯光子晶体光纤（V-DC-PCF）偏振分束器（PBS）。比较了无金膜和有金膜的 V-DC-PCF PBS 的 X 偏振（X-pol）和 Y 偏振（Y-pol）的耦合长度及其相应的耦合长度比。通过研究光纤结构参数和金膜厚度对耦合长度和耦合长度比的影响，对其进行了优化。随着传播长度的增加，在三个波长 1.610、1.631 和 1.650 μm 下，演示了所提出的 V-DC-PCF PBS 的 X-pol 和 Y-pol 的归一化输出功率。研究了三个分束长度（SL）188、185 和 182 μm 下的消光比（ER）、插入损耗（IL）与波长的关系。最后，证明了对于所提出的 V-DC-PCF PBS，最佳 SL 为 188 μm，X-pol 和 Y-pol 的 IL 小于 0.22 dB，分束带宽（SB）可覆盖 E + S + C + L + U 波段。所提出的 V-DC-PCF PBS 具有超短 SL、超宽 SB 和超低 IL，因此有望在激光、传感和密集波分复用系统中得到重要应用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf85/7826817/d6836cc1278c/sensors-21-00496-g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf85/7826817/87bf466c15e2/sensors-21-00496-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf85/7826817/6ce176101e0c/sensors-21-00496-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf85/7826817/de1f8bfe609f/sensors-21-00496-g003.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf85/7826817/9b4266fc7584/sensors-21-00496-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf85/7826817/9fc1fda23351/sensors-21-00496-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf85/7826817/52dad3450aa8/sensors-21-00496-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf85/7826817/0a6f969c4cea/sensors-21-00496-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf85/7826817/65d904306324/sensors-21-00496-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf85/7826817/7819e3079897/sensors-21-00496-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf85/7826817/161b3b68433f/sensors-21-00496-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf85/7826817/ee96918f6878/sensors-21-00496-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf85/7826817/ba860533ab01/sensors-21-00496-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf85/7826817/d6836cc1278c/sensors-21-00496-g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf85/7826817/87bf466c15e2/sensors-21-00496-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf85/7826817/6ce176101e0c/sensors-21-00496-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf85/7826817/de1f8bfe609f/sensors-21-00496-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf85/7826817/45c891eeb658/sensors-21-00496-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf85/7826817/9b4266fc7584/sensors-21-00496-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf85/7826817/9fc1fda23351/sensors-21-00496-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf85/7826817/52dad3450aa8/sensors-21-00496-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf85/7826817/0a6f969c4cea/sensors-21-00496-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf85/7826817/65d904306324/sensors-21-00496-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf85/7826817/7819e3079897/sensors-21-00496-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf85/7826817/161b3b68433f/sensors-21-00496-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf85/7826817/ee96918f6878/sensors-21-00496-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf85/7826817/ba860533ab01/sensors-21-00496-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf85/7826817/d6836cc1278c/sensors-21-00496-g014.jpg

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