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Title: Large-mode-area multicore Yb-doped fiber for an efficient high power 976 nm laser
Authors: Li, Huizi
Zang, Jichao
Raghuraman, Sidharthan
Chen, Shaoxiang
Goel, Charu
Xia, Nan
Ishaaya, Amiel A.
Yoo, Seongwoo
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2021
Source: Li, H., Zang, J., Raghuraman, S., Chen, S., Goel, C., Xia, N., Ishaaya, A. A. & Yoo, S. (2021). Large-mode-area multicore Yb-doped fiber for an efficient high power 976 nm laser. Optics Express, 29(14), 21992-22000.
Journal: Optics Express
Abstract: We present an efficient 976 nm laser generation from an ytterbium (Yb)-doped step-index multicore fiber (MCF) with six cores placed in a ring shape. Each of the six cores has a large-mode-area (LMA) and a low numerical aperture (NA), which makes the MCF equipped with the features of a large core-to-cladding area ratio and differential bending loss for wavelength and mode selection. Hence, the Yb-doped MCF benefits 976 nm laser generation by simultaneously suppressing unwanted 1030 nm emission and higher-order modes (HOMs). A 976 nm laser is obtained in a short piece (88 cm) of the Yb MCF, with a good slope efficiency of 46% with respect to launched pump power and the maximum output power of 25 W (pump power limited). A mode area of 1432 µm2 at the 976 nm is expected for the fundamental in-phase mode.
ISSN: 1094-4087
DOI: 10.1364/OE.428492
Rights: © 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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