3 μm新型超低损耗单模单偏振空芯反谐振光纤的设计

谢兆鑫; 盖浩杰; 王学军

doi:10.11884/HPLPB202537.250072

3 μm新型超低损耗单模单偏振空芯反谐振光纤的设计

doi: 10.11884/HPLPB202537.250072

谢兆鑫^{1, 2,},
盖浩杰^{1, 2},
王学军^{1, 2}

1.
石家庄铁道大学信息科学与技术学院，石家庄 050043
2.
河北省电磁环境效应与信息处理重点实验室，石家庄 050043

基金项目: 山西省重点实验室开放基金项目(CICIP2022001)；石家庄铁道大学引进人才科研启动项目（309000900110011）

详细信息

作者简介:
谢兆鑫，zhaoxinxie@stdu.edu.cn

中图分类号: TN929.11
计量
- 文章访问数: 33
- HTML全文浏览量: 13
- PDF下载量: 5
- 被引次数: 0
出版历程
- 收稿日期: 2025-04-13
- 修回日期: 2025-06-16
- 录用日期: 2025-06-10
- 网络出版日期: 2025-06-21

Design of novel ultra-low loss single-mode single-polarization hollow-core anti-resonant fiber at 3 μm wavelength

Xie Zhaoxin^{1, 2
,},
Ge Haojie^{1, 2},
Wang Xuejun^{1, 2}

1.
School of Information Science and Technology, Shijiazhuang Tiedao University, Shijiazhuang 050043, China
2.
Hebei Key Laboratory of Electromagnetic Environmental Effects and Information Processing, Shijiazhuang 050043, China

摘要

摘要: 为了激光在中红外波段实现更低损耗、单模、单偏振的稳定传输，设计了一种具有双包层嵌套式结构的抗弯曲空芯反谐振光纤构型。利用有限元法优化了其结构参数，在模拟仿真上证明了光纤的宽带低损耗单偏振的传输特性。该光纤在波长2.9～3.3 μm范围内限制损耗小于0.01 dB/km，高阶模抑制比大于1 000，在3 μm波长处的限制损耗低至0.0014 dB/km。通过引入不同的嵌套管厚度破坏了光纤结构的对称性，理论研究了光纤的单偏振特性，在波长2.996～3.004 μm内，偏振消光比大于10 000，具有极其稳定的单偏振效果。此外，根据理论分析表明该光纤还具有良好的抗弯曲性能，当y方向的弯曲半径大于5 cm时，仍能保证激光单偏振传输，弯曲损耗小于3.11 dB/km。所设计的空芯反谐振光纤构型在中红外光纤激光器等领域具有巨大的应用潜力。
- 低损耗 /
- 单偏振 /
- 单模 /
- 中红外波段 /
- 空芯反谐振光纤
Abstract: To achieve stable transmission of laser with lower loss, single mode, and single polarization in the mid-infrared band, a bend-resistant hollow-core anti-resonant fiber configuration with a double-cladding nested structure is designed in this paper. The finite element method is used to optimize the structural parameters, and the transmission characteristics of broadband low-loss single polarization of the fiber are proved in simulation. The confinement loss of this fiber is less than 0.01 dB/km within the wavelength range of 2.9−3.3 μm, the high-order mode extinction ratio is greater than 1,000, and the confinement loss is as low as 0.0014 dB/km at 3 μm wavelength. The symmetry of the fiber structure is destroyed by using different nested tube thicknesses, and the single-polarization characteristic of the fiber is theoretically investigated. Within the wavelength range of 2.996−3.004 μm, the polarization extinction ratio is greater than 10 000, which has an extremely stable single polarization effect. In addition, theoretical analysis indicates that this fiber also has excellent bending resistance performance. When the bending radius in the y-direction is greater than 5 cm, it can still ensure single-polarization laser transmission, and the bending loss is less than 3.11 dB/km. The designed hollow-core anti-resonant fiber configuration has great potential for application in the mid-infrared fiber laser and other fields.
- low loss /
- single-polarization /
- single mode /
- mid-infrared band /
- hollow-core anti-resonant fiber

HTML全文

图 1 HC-ARF截面图

Figure 1. The cross-section of HC-ARF

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图 2 外包层圆管直径对限制损耗和单模特性的影响

Figure 2. The impact of the outer cladding tube diameter on confinement loss and single-mode characteristics

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图 3 椭圆管对光纤损耗和单模特性的影响

Figure 3. The impact of elliptical tubes on fiber loss and single-mode characteristics

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图 4 嵌套谐振管和玻璃棒对损耗和单模特性的影响

Figure 4. The impact of nested resonant tubes and glass rods on loss and single-mode characteristics

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图 5 不同波长下的基模限制损耗和单模特性趋势

Figure 5. The trends of fundamental mode confinement loss and single-mode characteristics under different wavelengths

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图 6 玻璃棒厚度t₂对光纤单偏振特性的影响

Figure 6. The impact of the glass rod thickness (t₂) on the single polarization characteristic

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图 7 t₂=2.93 μm时基模电场分布图

Figure 7. Electric field distribution of the fundamental mode when t₂=2.93 μm

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图 8 光纤的PER和限制损耗特性随波长的变化

Figure 8. The PER and confinement loss characteristics of fiber vary with wavelength

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图 9 弯曲半径对损耗的影响

Figure 9. The effect of bending radius on Loss

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图 10 沿x方向弯曲且R_b=4 cm时的基模电场分布图

Figure 10. The electric field distribution of the fundamental mode when bending along the x-axis with R_b=4 cm

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图 11 沿y正方向弯曲且R_b=6 cm时的基模电场分布图

Figure 11. The electric field distribution of the fundamental mode when bending in the positive direction along the y-axis with R_b=6 cm

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图 12 沿y负方向弯曲且R_b=9 cm时的基模电场分布图

Figure 12. The electric field distribution of the fundamental mode when bending in the negative direction along the y-axis with R_b=9 cm

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表 1 不同 HC-ARF性能的比较

Table 1. Comparison of the performances of different HC-ARFs

Ref.	wavelength/μm	loss/(dB/km)	bend loss/(dB/km)	PER
[1]	2	20.000	100@6 cm	＞500
[19]	3	0.520	100@6.5 cm	−
[21]	3～5	8.000	−	−
[23]	3	4.000	690@30 cm	−
This work	3	0.013	0.1@12 cm	91 075

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