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Title: 115  W fiber laser with an all solid-structure and a large-mode-area multicore fiber
Authors: Ji, Junhua
Raghuraman, Sidharthan
Huang, Xiaosheng
Zang, Jichao
Ho, Daryl
Zhou, Yanyan
Benudiz, Yehuda
Ami, Udi Ben
Ishaaya, Amiel A.
Yoo, Seongwoo
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2018
Source: Ji, J., Raghuraman, S., Huang, X., Zang, J., Ho, D., Zhou, Y., . . ., Yoo, S. (2018). 115  W fiber laser with an all solid-structure and a large-mode-area multicore fiber. Optics Letters, 43(14), 3369-3372. doi:10.1364/OL.43.003369
Journal: Optics letters
Abstract: We investigate mode-area scaling by means of supermode operation in an all-solid multicore fiber. To obtain a large-mode area (LMA), we designed and fabricated an active double-clad multicore fiber, where each ytterbium-doped core is 19 μm in diameter and has a numerical aperture of 0.067, comparable to the core of the largest available commercial LMA fibers. The six large cores are stacked tightly in a ring structure to enable phase locking of the core fields and supermode operation. The fiber laser performance was investigated in a linear laser cavity with an external Talbot resonator for mode selection. The highest output power achieved was 115 W with an overall 61% slope efficiency corresponding to the pump power. The measured M2 was 1.43 for the central lobe with nearly 70% of the total power.
ISSN: 0146-9592
DOI: 10.1364/OL.43.003369
Schools: School of Electrical and Electronic Engineering 
Organisations: The Photonics Institute
Centre of Optical Fibre Technology
Research Centres: Photonics Research Centre 
Rights: © 2018 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
Appears in Collections:EEE Journal Articles

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