Abstract

In this Letter, we report on widely tunable pulse generation from a red-diode-clad-pumped mid-infrared (mid-IR) Er³⁺/Dy³⁺ codoped ZrF₄ fiber laser, for the first time, to the best of our knowledge. Using a Fe²⁺:ZnSe crystal, continuously tunable Q-switched pulses across the range of 3.06–3.62 µm have been attained, which not only represents the widest range (in wavelength domain) from a pulsed rare-earth-doped fiber laser at any wavelength, but also almost entirely covers the strong absorption band of C-H bonds in the mid-IR, providing a potential way for gas detection and polymer processing. In addition, the commercial InAs quantum-well-based saturable absorbers (SAs) have been employed instead, and the obtained longest Q-switching wavelength of 3.39 µm is slightly shorter than 3.444 µm determined by its nominal direct bandgap of 0.36 eV.

© 2023 Chinese Laser Press

Widely tunable passively Q-switched Er³⁺-doped ZrF₄ fiber laser in the range of 3.4–3.7  μm based on a Fe²⁺:ZnSe crystal

Hongyu Luo, Jian Yang, Jianfeng Li, and Yong Liu
Photon. Res. 7(9) 1106-1111 (2019)

Red-diode-clad-pumped Er³⁺/Dy³⁺ codoped ZrF₄ fiber: A promising mid-infrared laser platform

Hongyu Luo, Yongzhi Wang, Junsheng Chen, Biao Wang, Jianfeng Li, and Yong Liu
Opt. Lett. 47(20) 5313-5316 (2022)

Gain-switched Fe:ZnSe laser pumped by a coupled-cavity Q-switched Er:ZrF₄ fiber laser

Stanislav Leonov, Mikhail Frolov, Yury Korostelin, Yan Skasyrsky, and Vladimir Kozlovsky
Opt. Lett. 48(11) 2957-2960 (2023)

Tunable passively Q-switched Dy³⁺-doped fiber laser from 2.71 to 3.08  μm using PbS nanoparticles

Hongyu Luo, Jianfeng Li, Ying Gao, Yao Xu, Xiaohui Li, and Yong Liu
Opt. Lett. 44(9) 2322-2325 (2019)

Fe₃O₄ nanoparticles as a saturable absorber for a tunable Q-switched dysprosium laser around 3  μm

Jian Yang, Jiyi Hu, Hongyu Luo, Jianfeng Li, Jishu Liu, Xiaohui Li, and Yong Liu
Photon. Res. 8(1) 70-77 (2020)