Mid‑infrared 2.8 μm tunable lasing based on
erbium‑doped fluoride fiber

doi:10.3969/j.issn.1007-5461.2024.02.009

Abstract

Abstract: Heavily erbium-doped fluoride fiber is used to enhance the process of energy transfer upconversion between erbium ions, leading to the generation of mid-infrared lasing around 2.8 μm. The fullband emission covering all the emitting lines of erbium ion from 0.5 μm to 3.0 μm is observed, and the emitting wavelengths agree well with the transitions between the corresponding energy levels. The full band lasing output of erbium ion is experimentally studied. It is found that 2.8 μm lasing is dominant due to the high doping level. With the pump power changing from 2 W to 4 W, the peak wavelength of 2.8 μm lasing could be tuned in the range of 2714-2784 nm, which is caused by the gain competition combined with the selectivity of cavity and the effect of inhomogeneous broadening. With the pump power increasing above 3 W, the spectral splitting of lasing can be observed. The high stable mid-infrared lasing at 2.8 μm is obtained with the maximum output power of 0.7 W and slope efficiency of ~12%.

Key words: laser techniques, mid-infrared laser, erbium-doped fluoride fiber, laser tuning, spectral splitting

CLC Number:

TN248

TONG Liang , HUANG Haibo , WEN Yuxuan , CHEN Songyuan , TAO Junzhe , YE Shanshan , ZHENG Ziqi , WANG Yangyang , HUANG Song , GAO Weiqing . Mid‑infrared 2.8 μm tunable lasing based on erbium‑doped fluoride fiber[J]. Chinese Journal of Quantum Electronics, 2024, 41(2): 269-277.

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Mid‑infrared 2.8 μm tunable lasing based on erbium‑doped fluoride fiber

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