Opt Lett. 2019 Apr 1;44(7):1805-1808. doi: 10.1364/OL.44.001805.
We experimentally report the generation of wavelength-tunable blueshifting soliton in the visible spectral region through a gas-filled single-ring photonic crystal fiber (SR-PCF). In particular, in a He-filled SR-PCF, we observed a sharp narrow-band spectral peak at the first resonant spectral region of the SR-PCF, which results from phase-matched nonlinear processes. To the best of our knowledge, this is the first time investigating the influence of the core-cladding resonance on the blueshifting soliton. In addition, when Ar gas was filled into the SR-PCF, some interference fringes on the blueshifting soliton were observed at high pulse-energy levels due to plasma-induced pulse fission. These two experimental observations are confirmed by numerical simulations. Furthermore, through properly adjusting input pulse energy, we found that the blueshifting soliton can obtain a high conversion efficiency (∼84%) and its wavelength can be tuned over hundreds of nanometers (∼240 nm).
我们通过实验在充气体单环光子晶体光纤（SR-PCF）中报告了波长可调谐蓝移孤子的产生。具体来说，在充满氦气的 SR-PCF 中，我们在 SR-PCF 的第一个共振光谱区域观察到一个尖锐的窄带光谱峰值，这是由相匹配的非线性过程产生的。据我们所知，这是首次研究芯包层共振对蓝移孤子的影响。此外，当氩气填充到 SR-PCF 中时，由于等离子体诱导的脉冲分裂，在高脉冲能量水平下观察到蓝移孤子上的一些干涉条纹。这两个实验观察结果通过数值模拟得到了证实。此外，通过适当调整输入脉冲能量，我们发现蓝移孤子可以获得高转换效率（约 84%），并且其波长可以在数百纳米（约 240nm）范围内调谐。
