Chinese Optics Letters, 2016, 14 (12): 120601, Published Online: Aug. 2, 2018  

Multilayer-core fiber with a large mode area and a low bending loss

Author Affiliations
1 Key Lab of All Optical Network & Advanced Telecommunication Network of EMC, Beijing Jiaotong University, Beijing 100044, China
2 Institute of Lightwave Technology, Beijing Jiaotong University, Beijing 100044, China
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.

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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