Asian Journal of Physics Vol. 34, Nos 11 & 12 (2025) 677-683

Node-free seven-tube hollow-core anti-resonant fiber for low-loss broadband optical transmission

Arpita Pradhan1, Ashutosh Pratap Singh2, Bishnu P Pal1 and Somnath Ghosh1
1Department of Physics, École Centrale School of Engineering, Mahindra University, Hyderabad, Telangana, 500 043, India
2Department of Physics, Institute of Science, Banaras Hindu University, Varanasi-221 005, India

(In loving memory of Revered Professor M. S. Sodha)

We present a detailed investigation to understand the impact of the number of node-type and node-free circular cladding tubes in the context of hollow-core anti-resonant fibers (HC-ARFs) and propose an optimized design that enables low-loss transmission while supporting effective single-mode operation across the telecommunication wavelength band. For the node-free seven-tube HC-ARF design, the proposed structure achieves a total loss below 0.1 dB/km within the telecommunication wavelength range, covering the O-band to the U-band, and exhibits a peak higher-order mode extinction ratio (HOMER) ≈ 3044 at 1.55 µm. We also evaluate the large effective mode area to be Aeff ≈ 4227 µm2 . Furthermore, a fabrication tolerance analysis is incorporated to ascertain the robustness of the structure. This fiber holds strong potential for applications in future high-speed optical communication networks. © Anita Publications. All rights reserved.
Doi: XXX
Keywords: Hollow core anti-resonant fiber, low loss, large bandwidth.

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