论文标题
窄带真空紫外线通过双泵充气的光子光纤晶体纤维中的合作拉曼散射
Narrowband vacuum ultraviolet light via cooperative Raman scattering in dual-pumped gas-filled photonic crystal fiber
论文作者
论文摘要
许多领域（例如生物光谱和光化学）通常需要真空紫外线（VUV）脉冲的来源，这些脉冲具有狭窄的线宽，可在较大频率范围内进行调节。但是，大多数可用的VUV光源不能同时满足这两个要求，而没有什么真正紧凑，具有成本效益且易于使用的非专家使用。在这里，我们介绍了一种新颖的方法，可以解决这一挑战。它基于用两种光谱远处脉冲同时泵送的充满氢的空心光子晶体纤维。刺激的拉曼散射能够产生气体中集体分子运动的连贯性波，与仔细的分散工程以及对泵光的模态含量的控制，促进了两个独立的拉曼梳子之间的合作，从而导致频谱进入VUV深处。使用该系统，我们证明了仅使用商业固态激光器传递的100 MW输入功率，窄带线的双拉曼梳子的产生，窄带线的双拉曼梳子延伸至141 nm。该方法可以使任何实验室都可以使用可调的VUV光，从而在许多学科的许多研究领域中提高进步。
Many fields such as bio-spectroscopy and photochemistry often require sources of vacuum ultraviolet (VUV) pulses featuring a narrow linewidth and tunable over a wide frequency range. However, the majority of available VUV light sources do not simultaneously fulfill those two requirements, and few if any are truly compact, cost-effective and easy to use by non-specialists. Here we introduce a novel approach that goes a long way to meeting this challenge. It is based on hydrogen-filled hollow-core photonic crystal fiber pumped simultaneously by two spectrally distant pulses. Stimulated Raman scattering enables the generation of coherence waves of collective molecular motion in the gas, which together with careful dispersion engineering and control over the modal content of the pump light, facilitates cooperation between the two separate Raman combs, resulting in a spectrum that reaches deep into the VUV. Using this system, we demonstrate the generation of a dual Raman comb of narrowband lines extending down to 141 nm using only 100 mW of input power delivered by a commercial solid-state laser. The approach may enable access to tunable VUV light to any laboratory and therefore boost progress in many research areas across multiple disciplines.
