Wavelength-tunable spatiotemporal mode-locking in a large-mode-area Er:ZBLAN fiber laser at 2.8 µm

We report a tunable spatiotemporally mode-locked large-mode-area Er:ZBLAN fiber laser based on the nonlinear polarization rotation technique. A diffraction grating is introduced to select the operating wavelength. Under the spectral and spatial filtering effects provided by the grating and spatial c...

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Bibliographic Details
Published in:Optics letters 2024-03, Vol.49 (5), p.1117-1120
Main Authors: Zeng, Qinghui, Tang, Ziya, Ouyang, Deqin, Yu, Linpeng, Wang, Jiachen, Luo, Xing, Dong, Wenjun, Yan, Peiguang, Wang, Jinzhang, Wang, Pengfei, Lue, Qitao, Guo, Chunyu, Ruan, Shuangchen
Format: Article
Language:English
Subjects:
Fiber lasers
Gratings (spectra)
Infrared lasers
Laser applications
Laser mode locking
Spatial filtering
Tunable lasers
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Summary:We report a tunable spatiotemporally mode-locked large-mode-area Er:ZBLAN fiber laser based on the nonlinear polarization rotation technique. A diffraction grating is introduced to select the operating wavelength. Under the spectral and spatial filtering effects provided by the grating and spatial coupling respectively, stable ps-level spatiotemporally mode-locked pulses around 2.8 µm with a repetition rate of 43.4 MHz are generated. Through a careful adjustment of the grating, a broad wavelength tuning range from 2747 to 2797 nm is realized. To the best of our knowledge, this is the first wavelength-tunable spatiotemporally mode-locked fiber laser in the mid-infrared region.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.515735