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Title: High energy ultrafast laser at 2 μm using dispersion engineered Thulium-doped fiber
Authors: Chen, Yuhao
Chen, Shaoxiang
Sidharthan, Raghuraman
Cheng, Chen Jian
Liu, Kun
Rao, Shreesha D. S.
Bang, Ole
Wang, Qijie
Tang, Dingyuan
Yoo, Seongwoo
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2019
Source: Chen, Y., Chen, S., Sidharthan, R., Cheng, C. J., Liu, K., Rao, S. D. S., Bang, O., Wang, Q., Tang, D. & Yoo, S. (2019). High energy ultrafast laser at 2 μm using dispersion engineered Thulium-doped fiber. IEEE Photonics Journal, 11(6).
Project: 2018-T1- 001-148 (RG 84/18)
S16-1257-IPP COY-15-IPP/160006
Journal: IEEE Photonics Journal
Abstract: We report on demonstration of high energy pulse laser at 2 μm by employing a normal dispersion fiber attained by a waveguide dispersion engineering. The normal dispersion fiber has a W-type refractive index profile, with a Thulium(Tm)-doped core. In contrast to a strong anomalous dispersion at 2 μm in a step-index fiber, the design allows strong waveguide dispersion that can generate normal dispersion at the Tm emission band. Mode area scalability of this fiber is discussed under the normal dispersion requirement. The Tm-doped fiber (TDF) is deployed in a ring cavity to produce mode-locked pulses near 2 μm. Subsequently, the pulse is amplified with more than 27 dB gain through the normal dispersion TDF. The output pulse energy reaches up to ∼525 nJ at 1852 nm without pulse breaking due to the engineered dispersion. The achieved pulse energy is record high for all-fiber configuration near 2 μm, to our knowledge.
ISSN: 1943-0655
DOI: 10.1109/JPHOT.2019.2945928
Rights: © 2019 IEEE. This journal is 100% open access, which means that all content is freely available without charge to users or their institutions. All articles accepted after 12 June 2019 are published under a CC BY 4.0 license, and the author retains copyright. Users are allowed to read, download, copy, distribute, print, search, or link to the full texts of the articles, or use them for any other lawful purpose, as long as proper attribution is given.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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