Chen Siyuan, Wang Caoyuan, Xiong Cong, Qin Yu, Zhu Jie, Shen Yichun, Xiao Limin
Advanced Fiber Devices and Systems Group, Key Laboratory of Micro and Nano Photonic Structures (MoE), Key Laboratory for Information Science of Electromagnetic Waves (MoE), Shanghai Engineering Research Center of Ultra-Precision Optical Manufacturing, School of Information Science and Technology, Fudan University, Shanghai 200433, China.
Zhongtian Technology Advanced Materials Co., Ltd., Nantong 226009, China.
Micromachines (Basel). 2025 Apr 5;16(4):438. doi: 10.3390/mi16040438.
The liquid-core anti-resonant fiber (LCARF) has emerged as a versatile platform for applications in nonlinear photonics, biological sensing, and other domains. In this study, a systematic and comprehensive analysis of LCARF was conducted via the finite element method to evaluate its performance across a wavelength range of 400-1200 nm. This included an assessment of the effects of structural parameters such as capillary wall thickness and the ratio of cladding tube diameter to core diameter on confinement loss and effective refractive index. The results reveal that the proposed core-only-filled approach significantly reduces the confinement loss compared to the conventional fully filled approach, thus facilitating signal transmission. Furthermore, the optimization of geometrical parameters greatly improves the single-mode characteristics of LCARFs. This work establishes a robust theoretical framework and provides valuable support for enhancing the LCARF applications in optofluidics, thereby contributing to the evolution of specialty fiber technologies.
液芯抗共振光纤（LCARF）已成为非线性光子学、生物传感及其他领域应用的通用平台。在本研究中，通过有限元方法对LCARF进行了系统全面的分析，以评估其在400 - 1200 nm波长范围内的性能。这包括评估诸如毛细管壁厚度以及包层管直径与芯直径之比等结构参数对限制损耗和有效折射率的影响。结果表明，与传统的完全填充方法相比，所提出的仅芯填充方法显著降低了限制损耗，从而有利于信号传输。此外，几何参数的优化极大地改善了LCARF的单模特性。这项工作建立了一个强大的理论框架，并为增强LCARF在光流体学中的应用提供了有价值的支持，从而推动了特种光纤技术的发展。
