A Negative-Curvature Hollow-Core Fiber Structure With Double Trigonal-Symmetrical Anti-Resonant Elements

IEEE Photonics Journal

Jinggang Peng¹  Haiqing Li¹  Yingbin Xing¹  Yingbo Chu¹  Yanyan Zhou¹  JinYan Li¹  Shijie Wang¹  Ruiting Cao¹  Nengli Dai¹ 

[1] Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, Hubei, China;

关键词: Negative-curvature hollow-core fibers;    single-mode;    polarization-maintaining;   

DOI  :  10.1109/JPHOT.2021.3136895

来源: DOAJ

【 摘 要 】

We propose a novel negative-curvature hollow-core fiber structure with double trigonal-symmetrical anti-resonant elements implementing single-mode or polarization-maintaining transmission for high-power laser delivery in the 1 µm wavelength window. For the single-mode fiber, the single-mode performance with a higher-order modes extinction ratio (HOMER) as high as 4.65*10⁴ is achieved, and it remains >1*10⁴ with a large fault tolerance proportion of tubes size, which can increase the flexibility of fiber fabrication. For another polarization-maintaining fiber, an ultra-low confinement loss of 0.005 dB/m is obtained for polarization-maintaining transmission by optimizing the refractive index of the two transverse glass tubes, while the polarization extinction ratio and HOMER remain both >1*10³. This is the first birefringent negative-curvature hollow-core fiber with a loss below 0.01 dB/m in the 1 µm wavelength window.

【 授权许可】

Unknown