Courtney Trevor L, Hemmer Patrick, Welsh Chad, Amezcua-Correa Rodrigo, Keyser Christian K
Opt Lett. 2024 Jul 15;49(14):3926-3929. doi: 10.1364/OL.527743.
We present the first, to the best of our knowledge, investigation of the gain competition between rotational and vibrational stimulated Raman scattering (SRS) in the transient regime for a hydrogen (H)-filled antiresonant fiber (ARF) with the aim of generating multispectral emission composed of only rotational SRS. We show numerically and experimentally that purely rotational emission requires optimization of ARF length and spectral transmission, pump power and polarization, and H pressure. In this work, the H-filled ARF is pumped by 40 kW, 7 ns pulses at λ = 1.06 µm to produce six discrete rotational lines from 1.1 to 1.7 µm with unique temporal profiles and pulse energies up to tens of microjoules.
据我们所知，我们首次对填充氢气（H）的反谐振光纤（ARF）在瞬态下的转动和振动受激拉曼散射（SRS）之间的增益竞争进行了研究，目的是产生仅由转动SRS组成的多光谱发射。我们通过数值和实验表明，纯转动发射需要优化ARF长度和光谱透射率、泵浦功率和偏振以及氢气压力。在这项工作中，填充氢气的ARF由波长λ = 1.06 µm、能量40 kW、脉宽7 ns的脉冲泵浦，以产生从1.1到1.7 µm的六条离散转动谱线，这些谱线具有独特的时间轮廓，脉冲能量高达数十微焦耳。
