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Title: Anti-resonant hollow-core fiber fusion spliced to laser gain fiber for high-power beam delivery
Authors: Goel, Charu
Li, Huizi
Muhammad Rosdi Abu Hassan
Chang, Wonkeun
Yoo, Seongwoo
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2021
Source: Goel, C., Li, H., Muhammad Rosdi Abu Hassan, Chang, W. & Yoo, S. (2021). Anti-resonant hollow-core fiber fusion spliced to laser gain fiber for high-power beam delivery. Optics Letters, 46(17), 4374-4377.
Project: QEP-P4
Journal: Optics Letters
Abstract: We present the selective excitation of the fundamental mode in an anti-resonant hollow-core fiber (ARHCF) fusion-spliced with a commercial large mode area (LMA) fiber. By designing and fabricating a single-ring ARHCF that is mode-matched to a LMA fiber and by splicing the two using a CO2 laser-based splicer, we achieve a coupling efficiency of 91.2% into the fundamental mode. We also demonstrate an all-fiber integration of an ARHCF with a commercial ytterbium-doped fiber in a laser cavity for beam delivery application. Coupling of the single-mode laser output beam into the fundamental mode of the ARHCF is demonstrated with 90.4% efficiency (<0.45dB loss) for up to 50 W continuous wave beam in a stable and alignment-free all-fiber laser setup.
ISSN: 0146-9592
DOI: 10.1364/OL.436054
DOI (Related Dataset): 10.21979/N9/FOOMTH
Schools: School of Electrical and Electronic Engineering 
Research Centres: The Photonics Institute 
Rights: © 2021 Optical Society of America. All rights reserved. This paper was published in Optics Letters and is made available with permission of Optical Society of America.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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