[1] Aydin Y O, Fortin V, Vallee R et al. Towards power scaling of 2.8 µm fiber lasers[J]. Optics Letters, 43, 4542-4545(2018).

[2] Aydin Y O, Fortin V, Maes F et al. Diode-pumped mid-infrared fiber laser with 50% slope efficiency[J]. Optica, 4, 235-238(2017).

[3] Luo H Y, Shi J C, Chen J S et al. Towards high-power and -efficiency ∼2.8 μm lasing: lightly-erbium-doped ZrF4 fiber laser pumped at ∼1.7 μm[J]. IEEE Journal of Lightwave Technology, 42, 316-325(2024).