Max Planck Institute for the Science of Light, Erlangen, Germany.
Phys Rev Lett. 2011 Nov 11;107(20):203902. doi: 10.1103/PhysRevLett.107.203902. Epub 2011 Nov 7.
We show theoretically that the photoionization process in a hollow-core photonic crystal fiber filled with a Raman-inactive noble gas leads to a constant acceleration of solitons in the time domain with a continuous shift to higher frequencies, limited only by ionization loss. This phenomenon is opposite to the well-known Raman self-frequency redshift of solitons in solid-core glass fibers. We also predict the existence of unconventional long-range nonlocal soliton interactions leading to spectral and temporal soliton clustering. Furthermore, if the core is filled with a Raman-active molecular gas, spectral transformations between redshifted, blueshifted, and stabilized solitons can take place in the same fiber.
我们从理论上证明，在充满拉曼非活性惰性气体的空芯光子晶体光纤中的光致电离过程会导致孤子在时域中以恒定的加速度加速，并且频率连续向更高频移动，仅受电离损耗限制。这种现象与众所周知的实心玻璃光纤中孤子的拉曼自频移红移相反。我们还预测了存在非常规的远程非局域孤子相互作用，从而导致光谱和时域孤子聚集。此外，如果光纤的芯部填充的是拉曼活性分子气体，则可以在同一根光纤中实现红移、蓝移和稳定孤子之间的光谱变换。
