Optimum design for comb-index core fiber with large mode area

Xiaofang, 苗效方 Miao; Peng, 吴鹏 Wu; Baoyin, 赵保银 Zhao

doi:10.3788/irla201948.0918005

Cited by 1 publication

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“…Jorgensen has proved that when the difference between the PF of the LP01 and LP11 modes is approximately 0.3, the single mode (SM) bandwidth is generated, and the single mode operation can be entirely performed. The SM bandwidth is the region where the first HOM is leaking and couples with cladding modes, while the FM is still confined to the core and has a large fraction of modal power within the core [24] , shown in gray shading in the figure below.…”

Section: ⅱ Fiber Structure and The Theoretical Modelmentioning

confidence: 99%

Investigation of a Large-Mode-Area Fiber Designed for 2.0 μm Based on Multi-Layer Holes Resonance

Shen,

Sun,

Kong

et al. 2023

IEEE Photonics J.

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This work proposes a novel large mode area fiber with multi-layer holes of 2.0 μm based on electromagnetic field theory and finite element analysis. Modifying the structure parameters can reduce the fundamental mode confinement loss to less than 0.1 dB/m, and the lowest high-order mode confinement loss may be greater than 10.0 dB/m. The fiber has exceptional single-mode transmission performance due to its high loss ratio. The effective mode field area is 3849 μm 2 , and the single mode core diameter is 80.0 μm. To obtain a larger mode field diameter, the construction used here includes a smaller cladding diameter in the already available large mode field fiber. The cladding parameters may be changed independently, making it convenient and adaptable to obtain the best simulation results. Compared to the large-mode field fiber standard, which has excellent single mode operation performance, the loss ratio of this design is substantially larger. Additionally, it can effectively sustain single mode operation when the wavelength shifts from 1.65 to 2.10 μm, which is advantageous for developing 2.0 μm fiber lasers.

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Section: ⅱ Fiber Structure and The Theoretical Modelmentioning

confidence: 99%