Wavelength-tunable spatiotemporal mode-locking in a large-mode-area Er:ZBLAN fiber laser at 2.8&#x2005;&#x00B5;m

Qinghui Zeng; Ziya Tang; Deqin Ouyang; Linpeng Yu; Linpeng Yu; Jiachen Wang; Xing Luo; Wenjun Dong; Peiguang Yan; Jinzhang Wang; Pengfei Wang; Qitao Lue; Chunyu Guo; Shuangchen Ruan; Shuangchen Ruan

doi:10.1364/OL.515735

Optics Letters
Vol. 49,
Issue 5,
pp. 1117-1120
(2024)
•https://doi.org/10.1364/OL.515735

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

Qinghui Zeng, Ziya Tang, Deqin Ouyang, Linpeng Yu, Jiachen Wang, Xing Luo, Wenjun Dong, Peiguang Yan, Jinzhang Wang, Pengfei Wang, Qitao Lue, Chunyu Guo, and Shuangchen Ruan

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Qinghui Zeng, Ziya Tang, Deqin Ouyang, Linpeng Yu, Jiachen Wang, Xing Luo, Wenjun Dong, Peiguang Yan, Jinzhang Wang, Pengfei Wang, Qitao Lue, Chunyu Guo, and Shuangchen Ruan, "Wavelength-tunable spatiotemporal mode-locking in a large-mode-area Er:ZBLAN fiber laser at 2.8 µm," Opt. Lett. 49, 1117-1120 (2024)

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Abstract

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.

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Supplementary Material (1)

Name	Description
Visualization 1	This video shows the rapid transition of the beam profile between the mode-locking and Q-switched mode-locking, confirming a spatiotemporal mode-locked state.

Data availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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