Abstract

We investigate coupling tolerances of selected designs of negative-curvature anti-resonant fibers (NC-ARFs) with open- and closed-boundary types of structure under linear and angular misalignment of the input near-infrared laser beam. The coupling tolerances of NC-ARFs are compared with those of a commercially available step-index fiber. The expected coupling efficiency for the step-index fiber is calculated using scalar diffraction theory and directly compared with measured profiles. We show that the analyzed NC-ARFs can provide lower sensitivity to input beam misalignment than the step-index fiber, despite having a numerical aperture approximately half of that of the step-index fiber (0.044 compared to 0.07, respectively). In particular, a nodeless design is only half as sensitive to input linear misalignment as the step-index fiber, whilst having an almost identical sensitivity to tilt. A 3.5-μm linear shift and 22 mrad tilt result in 10% decrease in total output power of the beam. The good match between experiment and calculations suggests that the profiles measured for NC-ARFs are correct.

© 2019 IEEE

Double negative curvature anti-resonance hollow core fiber

Xiang Chen, Xiongwei Hu, Luyun Yang, Jinggang Peng, Haiqing Li, Nengli Dai, and Jinyan Li
Opt. Express 27(14) 19548-19554 (2019)

Negative curvature hollow-core anti-resonant fiber for terahertz sensing

Istihad Mahmud Ankan, Md. Aslam Mollah, Jakeya Sultana, and Md. Saiful Islam
Appl. Opt. 59(28) 8519-8525 (2020)

Infrared glass-based negative-curvature anti-resonant fibers fabricated through extrusion

Rafael R. Gattass, Daniel Rhonehouse, Daniel Gibson, Collin C. McClain, Rajesh Thapa, Vinh Q. Nguyen, Shyam S. Bayya, R. Joseph Weiblen, Curtis R. Menyuk, L. Brandon Shaw, and Jasbinder S. Sanghera
Opt. Express 24(22) 25697-25703 (2016)

Optimization method for low-loss single-mode bending negative curvature anti-resonant hollow-core fiber designed by mode modification

Junyi He, Ping Jiang, Weinan Caiyang, Yan Qin, Miaofang Zhou, Jingxin Deng, Jing Yang, Lizhong Hu, and Huajun Yang
Appl. Opt. 61(36) 10778-10787 (2022)

Fabrication tolerances in As₂S₃ negative-curvature antiresonant fibers

R. Joseph Weiblen, Curtis R. Menyuk, Rafael R. Gattass, L. Brandon Shaw, and Jasbinder S. Sanghera
Opt. Lett. 41(11) 2624-2627 (2016)