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

Xie Zhaoxin; Ge Haojie; Wang Xuejun

doi:10.11884/HPLPB202537.250072

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Xie Zhaoxin, Ge Haojie, Wang Xuejun. Design of novel ultra-low loss single-mode single-polarization hollow-core anti-resonant fiber at 3 μm wavelength[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202537.250072

Citation:

Xie Zhaoxin, Ge Haojie, Wang Xuejun. Design of novel ultra-low loss single-mode single-polarization hollow-core anti-resonant fiber at 3 μm wavelength[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202537.250072

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

doi: 10.11884/HPLPB202537.250072

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

Received Date: 2025-04-13
Accepted Date: 2025-06-10
Rev Recd Date: 2025-06-16

Available Online: 2025-06-21

Abstract

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

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References(33)

References

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