@article{c9807f57e4224214ab5d3f823a188ac6,
title = "3 mJ all-fiber MOPA with a short-length highly Er3+-doped phosphate fiber",
abstract = "A very large mode-area 2 wt% erbium-doped double-clad phosphate fiber with a core diameter of 60 μm and core numerical aperture of 0.03 was fabricated and used for the last stage amplifier of an all-fiber pulsed laser master-oscillator power amplifier (MOPA) at 1550 nm. The Er3+double-clad phosphate fiber has a cladding-core ratio of 2.17 and a V number of 3.6 at 1550 nm. 3 mJ pulses with 21.5 ns duration were obtained with Gaussian-like spatial beam profile with only a 75 cm long phosphate gain fiber.",
keywords = "Erbium-doped fiber amplifiers, Optical fibers, Optical pulses",
author = "Joshua Olson and Xiushan Zhu and Baker, {R. Dawson} and Kort Wiersma and Michael Li and Jie Zong and Arturo Chavez-Pirson and N. Peyghambarian",
note = "Funding Information: Manuscript received September 17, 2020; revised October 23, 2020; accepted November 2, 2020. Date of publication November 5, 2020; date of current version November 17, 2020. This work was supported in part by an Army SBIR Phase II under Grant W9113M-19-C-0065 and in part by the Technology Research Initiative Fund (TRIF) Photonics Initiative of the University of Arizona. (Corresponding author: Xiushan Zhu.) Joshua Olson, Xiushan Zhu, R. Dawson Baker, and N. Peyghambarian are with the College of Optical Sciences, The University of Arizona, Tucson, AZ 85721 USA (e-mail: jolson@optics.arizona.edu; xszhu@email.arizona.edu; rbaker@optics.arizona.edu; nasser@optics. arizona.edu). Publisher Copyright: {\textcopyright} 2020 Institute of Electrical and Electronics Engineers Inc.. All rights reserved.",
year = "2020",
month = dec,
day = "1",
doi = "10.1109/LPT.2020.3036060",
language = "English (US)",
volume = "32",
pages = "1481--1484",
journal = "IEEE Photonics Technology Letters",
issn = "1041-1135",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "23",
}