• Chinese Optics Letters
  • Vol. 14, Issue 12, 120601 (2016)
Youchao Jiang1、2, Guobin Ren1、2、*, Yudong Lian1、2, Yu Liu1、2, Huaiqing Liu1、2, Haisu Li1、2, Wenhua Ren1、2, Wei Jian1、2, and Shuisheng Jian1、2
Author Affiliations
  • 1Key Lab of All Optical Network & Advanced Telecommunication Network of EMC, Beijing Jiaotong University, Beijing 100044, China
  • 2Institute of Lightwave Technology, Beijing Jiaotong University, Beijing 100044, China
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    DOI: 10.3788/COL201614.120601 Cite this Article Set citation alerts
    Youchao Jiang, Guobin Ren, Yudong Lian, Yu Liu, Huaiqing Liu, Haisu Li, Wenhua Ren, Wei Jian, Shuisheng Jian. Multilayer-core fiber with a large mode area and a low bending loss[J]. Chinese Optics Letters, 2016, 14(12): 120601 Copy Citation Text show less

    Abstract

    We present a single-mode multilayer-core fiber with a large mode area (LMA) and a low bending loss in this Letter. A low equivalent core-cladding refractive index difference is achieved by exploiting the multilayer structure. The multilayer structure has a better bending performance than a traditional step-index core and this structure also contributes to realizing different curved refractive index profiles that have a better bending performance. An index trench is also introduced to dramatically reduce the bending loss. The experimental results show that, at a wavelength of 1550 nm, the mode area of the fabricated fiber is about 215.5 μm2 and the bending loss is 0.58 dB/turn at a 10 mm bending radius. The LMA and excellent bending performance can be obtained simultaneously with the proposed fiber.
    nb(x,y)=n(x,y)(1+2R),(1)

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    2α=Im[2πΨBW(0,0)β0Ψ02dxdy],(2)

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    Lb=10lg[exp(2αl)]8.686αl,(3)

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    PI=Lb/MFD(dB/turn/μm),(4)

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    MFD=22π(rE2rdr)2πrE4rdr.(5)

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    Δ1m=Δ11(1((m1)/M)2),(6)

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    Youchao Jiang, Guobin Ren, Yudong Lian, Yu Liu, Huaiqing Liu, Haisu Li, Wenhua Ren, Wei Jian, Shuisheng Jian. Multilayer-core fiber with a large mode area and a low bending loss[J]. Chinese Optics Letters, 2016, 14(12): 120601
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