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8 July 2022 Development of multi-mode rod-type hollow-core antiresonant fiber
Zihan Dong, Xin Zhang, Peng Yao, Jingyuan Yao, Shuangqin Wan, Pu Wang
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Proceedings Volume 12280, 2021 International Conference on Optical Instruments and Technology: Advanced Laser Technology and Applications; 1228005 (2022) https://doi.org/10.1117/12.2620490
Event: 2021 International Conference on Optical Instruments and Technology, 2022, Online Only
Abstract
With the increasing output power of lasers, the problem of poor beam quality in most of them also arises. Therefore, we design, simulate and fabricate a hollow-core antiresonant fiber that can reduce high-order modes loss. The fabricated fiber has a rod structure (710 μm outer diameter) to resist the influence of bending, and its cladding is composed of ten noncontact capillaries. The fiber has a 128 μm core inscribed circle diameter, an average 40 μm cladding capillary inner diameter, and a tube wall thickness of about 650 nm. The test results of this fiber show that the transmission loss at 1 μm and 1.5 μm is close to 0.1 dB/m and in 2.6-4 μm band is mostly below 0.5 dB/m (except molecular absorption peak). The beam quality test results of this fiber show that its M2 is basically inversely proportional to the wavelength at 2.6-4 μm, and M2 below 3 μm is about 2. By observing the output spot of this fiber at 1 μm and 1.5 μm wavelength with a CCD camera, we can intuitively see its multimode transmission characteristics.
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Zihan Dong, Xin Zhang, Peng Yao, Jingyuan Yao, Shuangqin Wan, and Pu Wang "Development of multi-mode rod-type hollow-core antiresonant fiber", Proc. SPIE 12280, 2021 International Conference on Optical Instruments and Technology: Advanced Laser Technology and Applications, 1228005 (8 July 2022); https://doi.org/10.1117/12.2620490
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KEYWORDS
Mid-IR
Structured optical fibers
High power lasers
Optical fibers
Hollow waveguides
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