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Title: All-fiber short-wavelength tunable mode-locked fiber laser using normal dispersion thulium-doped fiber
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: 2020
Source: Chen, S., Chen, Y., Liu, K., Sidharthan, R., Li, H., Chang, C. J., . . . Yoo, S. (2020). All-fiber short-wavelength tunable mode-locked fiber laser using normal dispersion thulium-doped fiber. Optics Express, 28(12), 17570. doi:10.1364/oe.395167
Journal: Optics Express
Abstract: We report an all-fiber high pulse energy ultrafast laser and amplifier operating at the short wavelength side of the thulium (Tm) emission band. An in-house W-type normal dispersion Tm-doped fiber (NDTDF) exhibits a bending-induced distributed short-pass filtering effect that efficiently suppresses the otherwise dominant long wavelength emission. By changing the bending diameter of the fiber, we demonstrated a tunable mode-locked Tm-doped fiber laser with a very wide tunable range of 152 nm spanning from 1740 nm to 1892 nm. Pulses at a central wavelength of 1755 nm were able to be amplified in an all-fiber configuration using the W-type NDTDF, without the use of any artificial short-pass filter or pulse stretcher. The all-fiber amplifier delivers 2.76 ps pulses with an energy of ∼32.7 nJ without pulse break-up, due to the normal dispersion nature of the gain fiber, which marks so far, the highest energy amongst fiber lasers in the 1700 nm-1800 nm region.
ISSN: 1094-4087
DOI: 10.1364/OE.395167
Rights: © 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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