Wang Yazhou, Dasa Manoj K, Adamu Abubakar I, Antonio-Lopez J E, Habib Md Selim, Amezcua-Correa Rodrigo, Bang Ole, Markos Christos
Opt Lett. 2020 Apr 1;45(7):1938-1941. doi: 10.1364/OL.389613.
In this Letter, we demonstrate a high pulse energy and linearly polarized mid-infrared Raman fiber laser targeting the strongest absorption line of ${\rm CO}_2$CO at $\sim{4.2};\unicode {x00B5} {\rm m}$∼4.2µm. This laser was generated from a hydrogen (${\rm H}_2$H)-filled antiresonant hollow-core fiber, pumped by a custom-made 1532.8 nm Er-doped fiber laser delivering 6.9 ns pulses and 11.6 kW peak power. A quantum efficiency as high as 74% was achieved, to yield 17.6 µJ pulse energy at 4.22 µm. Less than 20 bar ${\rm H}_2$H pressure was required to maximize the pulse energy since the transient Raman regime was efficiently suppressed by the long pump pulses.
在本信函中，我们展示了一种高脉冲能量且线偏振的中红外拉曼光纤激光器，其针对二氧化碳（CO₂）在约4.2微米处的最强吸收线。该激光器由充氢（H₂）的反谐振空心光纤产生，由一台定制的1532.8纳米掺铒光纤激光器泵浦，该泵浦激光器输出6.9纳秒脉冲和11.6千瓦峰值功率。实现了高达74%的量子效率，在4.22微米处产生17.6微焦的脉冲能量。由于长泵浦脉冲有效抑制了瞬态拉曼 regime，因此将脉冲能量最大化所需的氢气（H₂）压力低于20巴。
