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Title: W-type normal dispersion thulium-doped fiber-based high-energy all-fiber femtosecond laser at 1.7  µm
Authors: Chen, Shaoxiang 
Chen, Yuhao
Liu, Kun
Sidharthan, Raghuraman
Li, Huizi
Chang, Chen Jian
Wang, Qi Jie
Tang, Dingyuan
Yoo, Seongwoo
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2021
Source: Chen, S., Chen, Y., Liu, K., Sidharthan, R., Li, H., Chang, C. J., Wang, Q. J., Tang, D. & Yoo, S. (2021). W-type normal dispersion thulium-doped fiber-based high-energy all-fiber femtosecond laser at 1.7  µm. Optics Letters, 46(15), 3637-3640.
Project: 2018-T1-001-148
Journal: Optics Letters
Abstract: We propose a parabolic W-type thulium-doped fiber for the 1.7 µm high-energy femtosecond pulsed laser. Despite its attractive normal dispersion, the fiber offers high gain in 1.7 µm region thanks to its distributed short-pass filtering effect. With a proper dispersion management in an all-fiber chirped pulse amplification (CPA) scheme, we demonstrate so far the highest pulse energy of 128.0 nJ in a stable pulse of 174 fs in the 1.7-1.8 µm region, which marks above an order of magnitude improvement in pulse energy while exhibiting the shortest pulse duration among fiber-based CPA works at 1.7 µm. Hence, we provide a pathway to an energy scalable and efficient femtosecond laser at 1.7 µm via a compact and elegant all-fiber solution.
ISSN: 0146-9592
DOI: 10.1364/OL.431023
Schools: School of Electrical and Electronic Engineering 
Research Centres: The Photonics Institute 
Rights: © 2021 Optical Society of America. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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