[1] Wang Z F, Zhou Z Y, Cui Y L et al. Research progress and prospect of fiber gas laser sources (Ⅱ): based on population inversion[J]. Chinese Journal of Lasers, 48, 0401009(2021).

[2] Wang Z F, Huang W, Li Z X et al. Progress and prospects of fiber gas laser sources (Ⅰ): based on stimulated Raman scattering[J]. Chinese Journal of Lasers, 48, 0401008(2021).

[3] Jones A M, Nampoothiri A V V, Ratanavis A et al. Mid-infrared gas filled photonic crystal fiber laser based on population inversion[J]. Optics Express, 19, 2309-2316(2011).

[4] Wang Z F, Yu F. Diode-pumped single-pass mid-infrared fiber gas laser[J]. Acta Optica Sinica, 34, 1014002(2014).

[5] Abu Hassan M R, Yu F, Wadsworth W J et al. Cavity-based mid-IR fiber gas laser pumped by a diode laser[J]. Optica, 3, 218-221(2016).

[6] Xu M R, Yu F, Knight J. Mid-infrared 1 W hollow-core fiber gas laser source[J]. Optics Letters, 42, 4055-4058(2017).

[7] Zhou Z, Tang N, Li Z et al. High-power tunable mid-infrared fiber gas laser source by acetylene-filled hollow-core fibers[J]. Optics Express, 26, 19144-19153(2018).

[8] Huang W, Cui Y, Zhou Z et al. Towards all-fiber structure pulsed mid-infrared laser by gas-filled hollow-core fibers[J]. Chinese Optics Letters, 17, 091402(2019).

[9] Cui Y L, Zhou Z Y, Huang W et al. Quasi-all-fiber structure CW mid-infrared laser emission from gas-filled hollow-core silica fibers[J]. Optics & Laser Technology, 121, 105794(2020).