Frontiers of Optoelectronics >
Design of hollow core step-index antiresonant fiber with stepped refractive indices cladding
Received date: 26 Sep 2020
Accepted date: 09 Nov 2020
Published date: 15 Dec 2021
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With the benefits of low latency, wide transmission bandwidth, and large mode field area, hollow-core antiresonant fiber (HC-ARF) has been a research hotspot in the past decade. In this paper, a hollow core step-index antiresonant fiber (HC-SARF), with stepped refractive indices cladding, is proposed and numerically demonstrated with the benefits of loss reduction and bending improvement. Glass-based capillaries with both high (n = 1.45) and low (as low as n = 1.36) refractive indices layers are introduced and formatted in the cladding air holes. Using the finite element method to perform numerical analysis of the designed fiber, results show that at the laser wavelengths of 980 and 1064 nm, the confinement loss is favorably reduced by about 6 dB/km compared with the conventional uniform cladding HC-ARF. The bending loss, around 15 cm bending radius of this fiber, is also reduced by 2 dB/km. The cladding air hole radius in this fiber is further investigated to optimize the confinement loss and the mode field diameter with single-mode transmission behavior. This proposed HC-SARF has great potential in optical fiber transmission and high energy delivery.
Botao DENG , Chaotan SIMA , Hongyu TAN , Xiaohang ZHANG , Zhenggang LIAN , Guoqun CHEN , Qianqing YU , Jianghe XU , Deming LIU . Design of hollow core step-index antiresonant fiber with stepped refractive indices cladding[J]. Frontiers of Optoelectronics, 2021 , 14(4) : 407 -413 . DOI: 10.1007/s12200-020-1109-9
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