• Infrared and Laser Engineering
  • Vol. 48, Issue 9, 918005 (2019)
Miao Xiaofang1、2、*, Wu Peng1、2, and Zhao Baoyin1
Author Affiliations
  • 1[in Chinese]
  • 2[in Chinese]
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    DOI: 10.3788/irla201948.0918005 Cite this Article
    Miao Xiaofang, Wu Peng, Zhao Baoyin. Optimum design for comb-index core fiber with large mode area[J]. Infrared and Laser Engineering, 2019, 48(9): 918005 Copy Citation Text show less

    Abstract

    The wave-guide structure of the large mode area fiber with a comb-index core was optimized by adding a high refractive index platform in the outer layer of the fiber core, which provided a performance promotion on the parameters of mode field area, mode field distribution and bending resistance. The simulation results show that the optimized refractive index distribution increases the fiber′s mode field area by more than 700 μm2, and reduces bending loss of the fundamental mode from 6 dB/m to 0.1 dB/m at the same bending radius compared with the original comb-index distribution. Moreover, the mode field distributions including Gauss-like distribution, flattened distribution and hollow distribution, can be obtained by simply modulating the refractive-index parameters of the outermost platform, which may meet the needs of special laser processing industry.
    Miao Xiaofang, Wu Peng, Zhao Baoyin. Optimum design for comb-index core fiber with large mode area[J]. Infrared and Laser Engineering, 2019, 48(9): 918005
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